- ±6°
- 14 CFR
- 100-hour inspection
- A.C
- A/FD
- A-la-carte
- A la Carte Bar
- A&P
- AA
- ABC
- Abeam
- Above Ground Level (AGL)
- Absolute accuracy
- Absolute altitude
- Absolute Ceiling
- Absolute pressure
- AC
- ACAS
- Accelerate-go distance
- Accelerate-stop distance
- Accelerated Stall
- Acceleration
- Acceleration error
- Accelerometer
- Accessible Tourism
- Accessible Travel
- Accommodation
- Activities
- Actual Time of Arrival
- AD
- ADC
- Add-on
- ADF
- ADF (Automatic Direction Finder)
- ADI
- Adiabatic cooling
- Adiabatic heating
- Adiabatic Lapse Rate
- Adjoining rooms
- Adjustable-pitch propeller
- Adjustable stabilizer
- ADM
- Adoption Rate
- ADS-B
- ADT
- Advance Purchase Fare
- Advance purchase requirement
- Advection fog
- Adventure tour
- Adventure travel
- Adventure Traveler
- Adverse yaw
- aerodrome
- Aerodynamics
- aerodyne
- aeronaut
- Aeronautical chart
- Aeronautical Decision-Making
- Aeronautical decision-making (ADM)
- Aeronautical Information Manual
- Aeronautical Information Manual (AIM)
- aeroplane
- aerostat
- AF
- Affiliated Aircraft
- Affinity Card
- Affinity group
- Aft
- After-departure charge
- Agent
- AGL
- Agonic line
- Agreement Aircraft
- AHRS
- AI
- Aileron
- ailerons
- AIM
- AIM (Aeronautical Information Manual)
- AIO variables
- air base
- Air Crewmember Essential for the Mission
- Air data computer (ADC)
- Air Defense Identification Zone (ADIZ)
- air force
- Air mass
- Air mile
- Air route surveillance radar (ARSR)
- Air route traffic control center (ARTCC)
- Air-Sea
- Air Speed Indicator (ASI)
- Air Taxi Operator
- Air Traffic Control (ATC)
- Air traffic control radar beacon system (ATCRBS)
- Air Travel
- Air Travel Card
- Airalo
- Aircraft
- Aircraft Accident
- Aircraft Acquisition
- Aircraft age
- Aircraft altitude
- Aircraft approach category
- Aircraft Incident
- Aircraft lessor
- Aircraft livery
- Aircraft type
- Airfoil
- Airline
- Airline Alliance
- Airline fare
- Airlines Reporting Corporation (ARC)
- airman
- Airmen’s Meteorological Information (AIRMET)
- AIRMET
- airplane
- Airplane Flight Manual (AFM)
- Airplane Owner/Information Manual
- airport
- Airport access fee
- Airport code
- Airport Codes
- Airport diagram
- Airport/Facility Directory (A/FD)
- Airport surface detection equipment (ASDE)
- Airport surveillance radar approach
- Airport surveillance radar (ASR)
- Airport Tax
- Airport transfer
- airship
- Airspace Classes
- Airspace Conflict
- Airspeed
- Airspeed indicator
- airstair
- Airtanker
- Airway
- Airworthiness
- Airworthiness Certificate
- Airworthiness Directive
- Airworthiness Directive (AD)
- Alert area
- All Inclusive
- All-inclusive package
- All-inclusive resort
- Alliance
- Almanac data
- Alpha Code
- ALS
- Alternate airport
- Alternate static source
- Alternate static source valve
- Alternative Tourism
- Alternative Travel
- Altimeter
- Altimeter Setting
- Altitude
- Altitude engine
- Altitude indicator
- Alumni tour
- AM
- Ambassador
- Ambient pressure
- Ambient temperature
- AME
- Amendment status
- Amenities
- Amenity
- Amenity kit
- Amenity package
- American plan
- AMEX
- Amidships
- Ammeter
- AMT
- an airplane. ELT
- Aneroid
- Aneroid barometer
- Angle of attack
- Angle of Incidence
- Anhedral
- Anniversary travel
- Annual inspection
- Antebellum
- Anti-ice
- Antiservo tab
- APEX
- Approach
- Approach control
- Approach lighting system (ALS)
- Apron
- ARC
- Archipelago
- Area chart
- Area forecast (FA)
- Area navigation (RNAV)
- Arm
- ARSR
- ARTA
- Artificial horizon
- AS
- ASC Fee
- ASOS
- Aspect ratio
- ASR
- AST
- ASTA
- Asymmetric thrust
- AT
- ATC
- ATC (Air Traffic Control)
- ATCRBS
- ATIS
- ATIS (Automatic Terminal Information Service)
- Atmospheric propagation delay
- ATO
- Attitude
- Attitude and heading reference system (AHRS)
- Attitude director indicator (ADI)
- Attitude Heading Reference System (AHRS)
- Attitude indicator
- Attitude instrument flying
- Attitude management
- Attractions
- Audio Control Panel (ACP)
- Autobahn
- Autogiro or autogyro
- autogyro
- Autokinesis
- Automated Surface Observing System (ASOS)
- Automated Weather Observing System (AWOS)
- Automatic dependent surveillance—broadcast (ADS–B)
- Automatic Direction Finder
- Automatic direction finder (ADF)
- Automatic Direction Finding (ADF)
- Autopilot
- Auxiliary fuel pump
- Auxiliary power unit (APU)
- Availability
- available seat miles
- available ton miles (ATMs)
- Average room rate
- AVGAS
- Aviation Alphabet
- Aviation Hazard
- Aviation medical examiner (AME)
- Aviation Routine Weather Report (METAR)
- aviator
- aviatrix
- Avionics
- Avionics master switch
- AWIS
- AWOS
- Axes of an aircraft
- Axial flow compressor
- AY
- AZ
- Azimuth
- Azimuth card
- B&B
- Babymoon
- Back course (BC)
- Back to back
- Back-to-back ticket(ing)
- Backpack
- Backpacker
- Backpacking
- Baggage Allowance
- Baggage handler
- Baggage master
- Balance tab
- Balcony
- balloon
- Bar
- Barbecue facilities
- Barge cruising
- Baro-aiding
- Barometric altitude
- Barometric scale
- Base
- Base fare
- Base leg
- Baseline
- Basic empty weight (GAMA)
- BC
- Beach holiday
- Beam
- Bearing
- Bed and breakfast (B&B)
- Bell captain
- Bellboy
- Bellman
- Benelux
- Bernoulli’s Principle
- Berth
- Bespoke tour
- Best lift over drag ratio
- Biking Trips and tours
- biplane
- Biplanes
- Birthday travel
- Black Box
- Black boxes
- Black Friday
- Blackout dates
- Blade angle
- Bleed air
- blimp
- Block
- Block altitude
- Block time
- Blocked space
- Boarding
- Boarding pass
- bomber
- Booking.Com
- Booking form
- Booking Number
- Boutique hotel
- Bow
- Break-even point (BEP)
- Break-even pricing
- Breakage
- breakeven load factor
- Breakfast buffet
- Bridal suite
- Bridge
- Bucket List
- Bucket list destination
- Bucket list destinations
- Budget-friendly travel
- Buffet breakfast
- Bulk contract
- Bulk fare
- Bulkhead
- Bulkhead Seat
- Bumping
- Bunkbed
- Bureau
- Busbud
- Business class
- by impact forces, automatically turns it on. Emergency overrun
- Bypass ratio
- Cabin
- Cabin-(Aircraft)
- Cabin altitude
- Cabin Crew
- Cabin steward
- Cage
- Calibrated
- Calibrated airspeed (CAS)
- Calibrated orifice
- Call sign
- Camber
- Campervan
- Camping
- Canard
- Canard configuration
- Cancellation fee
- Cancellation penalty
- Cantilever
- Cape
- Captain
- Carbon monoxide
- Card mill
- Cargo
- carried in an aircraft to help locate it in the event of a crash. A special switch, activated
- Carrier
- Carry on
- Carry-On Baggage
- CAS
- Cashless cruising
- Casual research
- CAT I/II/III approaches
- CAVU
- CAVU (Ceiling and Visibility Unlimited)
- Cay
- CDI
- CDW
- Ceiling
- Ceiling and Visibility Unlimited
- Celebrity Travel
- Center of gravity (CG)
- Center of pressure
- centerline. The final approach normally extends from the base leg to the runway. Fixed Base Operator (FBO)
- Centrifugal flow compressor
- Centrifugal force
- Centripetal force
- Certified Tour Professional (CTP)
- Certified Travel Associate
- Certified Travel Counselor (CTC)
- Certified Travel Industry Specialist (CTIS)
- CG
- Chain-ratio method
- Chamber of commerce
- Chancery
- Change of equipment
- Changeover point (COP)
- Chart Supplement U.S
- Charter
- Charter service
- Chauffer driven tours
- Check-In
- Check-Out
- Checked Luggage
- Checklist
- Checkride
- chord
- Chord line
- Chunnel
- Circle itinerary
- Circle trip
- Circling approach
- City guide
- City Pair
- City tour
- City trip
- Civil Aviation Administration of China
- Civil Aviation Authority (CAA)
- Class A airspace
- Class B airspace
- Class C airspace
- Class D airspace
- Class E airspace
- Class G airspace
- Class of Service
- Clean configuration
- Clear ice
- Clearance
- Clearance delivery
- Clearance limit
- Clearance on request
- Clearance void time
- CLIA
- Client list
- Client mix
- Climb
- Closed-end question
- Closeout
- Co-op tour
- Coach
- Cockpit
- Cockpit voice recorder (CVR)
- Codeshare flight
- Coefficient of lift (CL)
- CofA
- Coffee bar
- Cold front
- Collision damage waiver-(CDW)
- Commercial Aviation
- Commission
- Commission cap
- Commissionable tour
- Common carrier
- Common Traffic Advisory Frequency (CTAF)
- Commuter
- Comp policy
- Compass course
- Compass locator
- Compass rose
- Complex aircraft
- Complimentaries (comps)
- Compression bag
- Compressor pressure ratio
- Compressor stall
- Computer navigation fix
- Computerized reservation system (CRS)
- Concentric rings
- Concierge
- Concierge Level
- Condensation
- Condensation nuclei
- Conditions
- Cone of confusion
- Configuration
- Confirmed reservation
- Confluence
- Conflux
- Connecting Flight
- Connecting room
- Consolidation
- Consolidator
- Consortium
- Constant-Speed Propeller
- Consul
- Consulate
- Consumer
- Consumer protection plan
- Consumption constraints
- Continent
- Continental breakfast
- Continental climate
- Continuous flow oxygen system
- Contract
- Contract Aircraft
- Contrail
- Contrails
- Control and performance
- Control display unit
- Control pressures
- control surface
- control tower
- Controllability
- Controllable-pitch propeller (CPP)
- Controlled airspace
- Convective SIGMET
- Convective weather
- Convenience sample
- Convention and Visitors Bureau (CVB)
- Conventional landing gear
- Cooperative (co-op) advertising
- Cooperator Aircraft
- Coordinated flight
- Coordinated Universal Time (UTC)
- Coordinated Universal Time (UTC) –A standard time corresponding to the local time for the zone beginning at the meridian through Greenwich England. It is corrected for seasonal variations in the earth’s rotation about the sun. By international agreement i
- COP
- Coriolis illusion
- Corporate agency
- Corporate Rate
- Corporate Travel
- Cost index
- cost per available seat mile
- Cost-plus pricing
- Costing
- Couchette
- Coupled ailerons and rudder
- Coupon
- course
- Course deviation indicator
- Course Deviation Indicator (CDI)
- Covid-19
- Cowl flaps
- crab
- Crew resource management (CRM)
- Critical altitude
- Critical angle of attack
- Critical areas
- CRM
- Cross-check
- Cross-Country Flight (XC)
- Crosswind
- Crosswind leg
- Cruise
- Cruise clearance
- Cruise Tour
- CST
- CTA
- CTAF
- Cuisine
- Culinary Tourism
- Cultural Tourism
- Cultural Travel
- Culture
- Current induction
- Custom Tour
- Customer
- Customized tour
- Customized tours
- Customs
- CVB
- Cyber Monday
- D.C
- DA
- Dark adaptation
- Database
- Datum (Reference Datum)
- Day rate
- Day tour
- De-icing
- Dead reckoning
- Dead reckoning (DR)
- Deadheading
- Deadstick
- Deal
- Debark
- Deceleration error
- Decision altitude (DA)
- Decision height (DH)
- Deck
- Deck plan
- Deice
- Delivery flight
- Delta
- Delta wing
- Demand-based pricing
- Demand generators
- Demands
- Demographics
- Denied-boarding compensation
- Density altitude
- Department of State
- Departure control
- Departure leg
- Departure point
- Departure procedure (DP)
- Departure tax
- Deplane -To disembark, or get off, a plane.
- Deposit
- Deposit policy
- Deposition
- Descent
- Descriptive research
- Destination
- Destination alliance
- Destination management company (DMC)
- Destination marketing organization (DMO)
- Destination wedding
- Destination Weddings
- Detonation
- Deviation
- Dew
- Dewpoint
- DGPS
- DH
- Diet menu
- Differential ailerons
- Differential Global Positioning System (DGPS)
- Differential pressure
- Dihedral
- dihedral angle
- Diluter-demand oxygen system
- Dine-around-plan
- Dip error
- Direct access
- Direct Flight
- Direct indication
- Direct marketing
- Direct User Access Terminal Service (DUATS)
- Direct User Access Terminal System (DUATS)
- Directional stability
- dirigible
- Disaster Tourism
- Disclaimer
- Displaced threshold
- Distance circle
- Distance measuring equipment (DME)
- Distress
- diverting
- DMC
- DME
- DME arc
- Docent
- DOD
- Dogfight
- Doghouse
- Domestic airport
- Domestic fare
- Domestic Reduced Vertical Separation Minimum (DRVSM)
- Domestic travel
- Dormitory
- Double booking
- Double Double
- Double gimbal
- Double occupancy
- Double occupancy rate
- Double Room
- Double-room rate
- Downgrade
- Downwash
- Downwind leg
- DP
- DR
- Drag
- Drag curve
- Drift angle
- Driver-guide
- Driver guided tours
- Drop-off charge
- DRVSM
- dry lease
- Dual-Function Pilot
- DUATS
- Duplex
- Dutch roll
- Duty-Free
- Duty-free imports
- Dynamic hydroplaning
- Dynamic stability
- E-ticket
- Early Check-In
- EASA
- Eco-Conscious Travel
- Eco-friendly travel
- Eco/Sustainable Tourism
- Economic impact study
- Economy Class
- Ecotour
- Ecotourism
- Eddy current damping
- Eddy currents
- Educational tour
- EFC
- Elder hostel
- Electronic Boarding Pass
- Electronic flight display (EFD)
- Electronic ticket
- Elevator
- Elevator illusion
- elevons
- EM wave
- Embark
- Emergency
- Emergency overrun
- Empennage
- Emphasis error
- Empty-field myopia
- En route facilities ring
- En route high-altitude charts
- En route low-altitude charts
- En-suite
- Encoding altimeter
- End suite
- Engine
- Engine pressure ratio (EPR)
- English breakfast
- Entertainment program
- Environmental scanning
- EPR
- Equal time point (ETP)
- Equilibrium
- Equivalent airspeed
- Errors and Omissions Insurance
- Escort
- Escorted group tour
- Escrow accounts
- EST
- Estimated time en route
- Estimated time of arrival
- Estimated time of arrival (ETA)
- estimated to elapse for an aircraft to arrive at its destination or checkpoint.
- Estimations
- Estuary
- ETA
- ETD
- ETE
- Ethnicity
- Ethno-Tourism
- Eurailpass
- Eurocontrol
- European plan
- European Union Aviation Safety Agency (EASA)
- Evaporation
- Exchange order
- Exchange rate
- Exclusive fare
- Excursion
- Excursion Fare
- Executive suite
- Exhaust gas temperature (EGT)
- Exhibition
- Exotic Travel
- Expat
- Expect-further-clearance (EFC)
- Experiential Travel
- Exploratory research
- Explosive decompression
- Extended Mode S
- Extended Range Operations (ETOPS)
- Extension
- Extensions may occur before, during, or after the basic travel program.
- °F)
- F/O
- FA
- FAA
- Facilities
- FAF
- False horizon
- FAM (familiarization) tour
- Familiarity Tour
- Family plan
- Family Vacation
- Familymoon
- Fare Aggregator
- Fare Basis
- Fare basis (code)
- FARs
- Fatal Injury
- FBO
- FDI
- feather
- Feathering
- Federal airways
- Federal Aviation Administration (FAA)
- Federal Aviation Authority
- Federal Aviation Authority (FAA)
- Federal Aviation Regulations
- Feeder facilities
- Ferry Flight
- Final approach
- Final approach fix (FAF)
- Final Boarding Call
- Firewall
- First Aid
- First class
- First Officer
- Fishing Trips and tours
- FIT
- Five by five
- Fixating
- Fixed Base Operator
- Fixed Base Operator (FBO)
- Fixed-pitch propellers
- Fixed slot
- Fjord
- FL
- Flameout
- Flaperon
- Flaps
- Flare
- FLARM
- Flashpacker
- Flight Attendant
- Flight Bag
- Flight Computer
- Flight configurations
- Flight Crew
- Flight Crewmember
- Flight data recorder (FDR)
- Flight deck
- Flight director indicator (FDI)
- Flight Information Region (FIR) / Upper Information Region (UIR)
- flight level
- Flight level (FL)
- Flight management system (FMS)
- Flight number
- Flight path
- Flight patterns
- Flight plan
- Flight Service Station (FSS)
- Flight strips
- Floor load limit
- Fly-drive package
- Fly/drive tour
- Flying Dirty
- FMS
- FOD
- Fog
- Folio
- Force (F)
- Forced Landing
- Fore
- Foreign object damage (FOD)
- Form drag
- Frequent Flier
- Frequent Flier Program
- Frequent Flyer Program
- Frequent Independent travel (F.I.T.)
- Frise-type aileron
- Front
- Frost
- FSDO
- FSS
- Fuel jettison / fuel dumping
- Fuel load
- Fuel tankering
- Full house
- Full Pension / full board
- Full service hotel
- Full stall
- Fun park
- Function room
- Fundamental skills
- Funnel flight
- Fuselage
- G-Adventure
- Galley
- GAMA
- Gate
- Gate-Airport
- Gateway
- GDS
- General Aviation
- George
- Geotourism
- Gift shop
- Gimbal ring
- Glamping
- Glass Cockpit
- Glide ratio
- glider
- glideslope
- Glideslope (GS)
- Glideslope intercept altitude
- Global distribution system (GDS)
- Global landing system (GLS)
- Global navigation satellite system (GNSS)
- Global positioning system (GPS)
- GLS
- GNSS
- Go-Around
- Gone Tech
- Goniometer
- GPS
- GPS Altitude
- GPS Approach Overlay Program
- GPWS
- Graduation travel
- Graveyard spiral
- Great circle route
- Greenwich Mean Time (GMT)
- Gross Registered Tonnage (GRT)
- Gross Weight
- Ground adjustable trim tab
- Ground control
- Ground Effect
- Ground Mishap, Aircraft Ground Mishap
- Ground operator
- Ground proximity warning system (GPWS)
- Ground speed
- Grounding
- Groundspeed
- Group
- Group leader
- Group rate
- Group tour
- Group Travel
- GS
- GST
- Guaranteed share
- Guaranteed tour
- Guest account
- Guest houses
- Guest ranch
- Guide or guide service
- Guided tour
- Gull Wing Flying Wing
- GWPS
- Gyro
- Gyroscope
- Gyroscopic precession
- HAA
- HAL
- Half pension
- Hand-off
- Handshake
- Hangar
- Hard-copy
- HAT
- Hazard, Aviation Hazard
- Hazardous attitudes
- Hazardous Inflight Weather Advisory Service (HIWAS)
- Head tax
- Head-up display (HUD)
- Heading
- Heading bug
- Heading indicator
- Headwork
- Heavy
- Height above airport (HAA)
- Height above landing (HAL)
- Height above touchdown elevation (HAT)
- helicopter
- Heritage trail
- HF
- Hg
- Hidden-city ticketing
- Hideaway
- HIGE
- High performance aircraft
- High Performance Airplane
- High Reconnaissance
- High season
- Hiking Trips and tours
- Histotoxic hypoxia
- HIWAS
- HOGE
- Holafly
- Hold bars
- Hold line
- Holding
- Holding pattern
- Homing
- Honeymoon
- Honeymoon Travel
- Horizontal component of lift
- Horizontal situation indicator (HSI)
- Horizontal stabilizer
- Horsepower
- Hosted group tour
- Hostel
- Hot start
- Hotel
- Hotspot
- House
- Hover Landings
- HSI
- Hub
- Hub-and-spoke itinerary
- HUD
- Human factors
- Hung start
- Hurricane season
- Hydroplaning
- Hypemic hypoxia
- Hyperventilation
- Hypoxia
- Hypoxic hypoxia
- IAF
- IAP
- IAS
- IATA
- IATAN
- ICAO
- ICAO 24-bit Address (Hex Code)
- Ident
- Idle cutoff
- IDT
- IFR
- IFR Aircraft/IFR Flight
- Ignition switch
- ILS
- ILS categories
- ILS Category I: Provides for approach to a height above touchdown of not less than 200 feet, and with runway visual range of not less than 1,800 feet.
- ILS Category II: Provides for approach to a height above touchdown of not less than 100 feet and with runway visual range of not less than 1,200 feet.
- ILS Category IIIA: Provides for approach without a decision height minimum and with runway visual range of not less than 700 feet.
- ILS Category IIIB: Provides for approach without a decision height minimum and with runway visual range of not less than 150 feet.
- ILS Category IIIC: Provides for approach without a decision height minimum and without runway visual range minimum.
- IMC
- Immigration
- In-flight entertainment
- In-flight Service
- In season
- In transit
- Inbound operator
- Inbound tour
- Incentive or incentive commission
- Incentive tour
- Incentive travel
- Incident
- Incident with Potential (IWP)
- Incidental Charge
- Incidentals
- Incipient spin
- Inclinometer
- Inclusive tour
- Independent tour
- Indicated airspeed (IAS)
- Indicated airspeed (IAS) –The direct reading of the airspeed indicator uncorrected for variations in atmospheric density, installation or instrument error.
- Indicated altitude
- Indirect indication
- Induced angle of attack
- Induced drag
- Induction icing
- Inertial navigation system (INS)
- Infinity pool
- Infrastructure
- Initial approach fix (IAF)
- Inoperative components
- INS
- Inside cabin
- Inspector
- Instantaneous vertical speed indicator (IVSI)
- Instrument approach procedures (IAP)
- Instrument Flight Rules
- Instrument flight rules (IFR)
- Instrument Landing System
- Instrument landing system (ILS)
- Instrument meteorological conditions (IMC)
- Instrument Meterological Conditions (IMC)
- Instrument takeoff
- Integrated Standby Flight Display (IFSD)
- Intercontinental
- Intercooler
- Interference drag
- Interline connection
- Intermodal tour
- International Air Transport Association
- International airport
- International Civil Aviation Organization (ICAO)
- International Date Line
- International Rate Desk
- International standard atmosphere (IAS)
- Interpolation
- Inversion
- Inversion illusion
- Inverter
- Involvement device
- Island hopping
- Island life
- Isobars
- Isogonic lines
- It can also be used in hotels. In this situation, the client goes to the hotel reception, presents identification documents, and receives a key to their hotel room.
- Itinerary
- IVSI
- Jet
- jet bridge
- Jet Lag
- Jet route
- Jet stream
- Jetway / Air bridge
- Joint fare
- Jones Act
- Joystick
- Judgment
- Judgment sample
- Jump Seat
- Junior suite
- KCAS
- KIAS
- Kid-friendly hotel
- Kilometer
- Kinderhotels
- King room
- King size bed
- Kneeboard
- Knot
- Kollsman window
- Kph
- KTAS
- L/MF
- LAAS
- Lag
- Laminar-Flow Airfoil
- Land arrangements
- Land as soon as possible
- Land as soon as practical
- Land breeze
- Land Destinations
- Land immediately
- Land-only
- Land operator
- Land Transfers
- Landing gear
- Large Helicopter
- Last-seat availability
- Late booking fee
- Late Checkout
- Lateral axis
- Lateral stability (rolling)
- Latitude
- Layover
- LDA
- LDW
- LDW - loss damage waiver
- Lead-in price
- Lead radial
- Leading edge
- Leading edge devices
- Leading-edge flap
- Leans, the
- Leeward
- Leg
- Leisure travel
- Letter of agreement
- Level flight
- Licensed empty weight
- Lido deck
- Lift
- Lift over drag ratio
- Lighter-than-air craft (LTA craft)
- Limit load factor
- Limited service hotel
- Lineman
- Lines of flux
- List broker
- LMM
- Load factor
- Load Factor (g)
- load factor (LF)
- Loadmeter
- LOC
- Local area augmentation system (LAAS)
- Local controller
- Localizer (LOC)
- Localizer-type directional aid (LDA)
- Locater map
- Locator middle marker (LMM)
- Locator outer marker (LOM)
- Lodge
- Lodging
- Logistics
- LOM
- Long-haul flight
- Long Range Navigation (LORAN)
- Longitude
- Longitudinal axis
- Longitudinal stability
- Longitudinal stability (pitching)
- Low or medium frequency
- Low season
- Lower (bed)
- Lowest available fare
- Lowest fare
- Loyalty program
- Lubber line
- Luggage storage
- Luxury class
- Luxury Cruise
- Luxury Ocean Cruise
- Luxury River Cruise
- Luxury travel
- Luxury vacations
- MAA
- MAC
- Mach
- Mach meter
- Mach number
- Macro-environment
- Magnetic bearing (MB)
- Magnetic Bearing To
- Magnetic compass
- Magnetic Deviation
- Magnetic dip
- Magnetic heading (MH)
- Magnetic North
- Magnetic variation
- Magneto
- Magnus effect
- Maintenance Deficiency
- Management Company
- Mandatory altitude
- Mandatory block altitude
- Maneuverability
- Maneuvering Characteristics Augmentation System (MCAS)
- Maneuvering speed
- Maneuvering speed (VA)
- Manifest
- Manifold absolute pressure
- Manufacturer's serial number (MSN)
- MAP
- Margin identification
- Marker beacon
- Market
- Market demand
- Market forecast
- Marketing mix
- Marketing plan
- Marketing research
- Markup
- Markup pricing
- Mass
- Master account
- Master switch
- Maximum altitude
- Maximum authorized altitude (MAA)
- Maximum elevation figure (MEF)
- Maximum landing weight
- Maximum ramp weight
- Maximum stay
- Maximum takeoff weight
- Maximum weight
- Maximum zero fuel weight (GAMA)
- mayday
- MB
- MCA
- Mean aerodynamic chord (MAC)
- Mean Sea Level
- Mean sea level (MSL)
- Media
- Medical Attention
- Medium Helicopter
- Meet and greet
- Meet-and-greet service
- Meeting/conference tour
- MEF
- MEL
- Meridian
- Meridians
- Mesophere
- metaplane
- METAR
- MFD
- MH
- MHz
- Microburts
- Microenvironment
- Microwave landing system (MLS)
- Midships
- Mileage breakdown
- Military Aircraft
- Military operations area (MOA)
- Military training route (MTR)
- Minibar
- Minimalism
- Minimum altitude
- Minimum connect time
- Minimum crossing altitude (MCA)
- Minimum descent altitude (MDA)
- Minimum drag
- Minimum en route altitude (MEA)
- Minimum equipment list (MEL)
- Minimum obstruction clearance altitude (MOCA)
- Minimum reception altitude (MRA)
- Minimum safe altitude (MSA)
- Minimum vectoring altitude (MVA)
- Minimums section
- Mishap, Aviation Mishap
- Missed approach
- Missed approach point (MAP)
- Mission statement
- Mixed ice
- Mixture control
- MLS
- MM
- MOA
- MOCA
- Mode C
- Mode S
- Modified American plan (MAP)
- moment
- Moment arm
- Moment index (or index)
- monocoque
- monoplane
- Monoplanes
- Morse Code
- Motel
- Motorcoach
- Motorcoach Tour
- Motorcoach tour operators
- Motorhome
- Mountain Flying - Airplanes
- Mountain Flying - Helicopters
- Mountainous Terrain Escape Routes
- Movable slat
- MRA
- MSA
- MSL
- MST
- MTOW
- MTR
- Multi-city flight
- Multi-day tour
- Multi-function display (MFD)
- Multifunction Control Display Unit (MCDU)
- Multigenerational Travel
- Multilateration (MLAT)
- Multiple-entry visa
- Murder-mystery tour
- Museum
- MVA
- Mystery tour
- N number
- N1
- N2
- Nacelle
- NACG
- NACTA
- Narrow-Body Aircraft
- NAS
- National Aeronautical Charting Group (NACG)
- National Airspace System (NAS)
- National Route Program (NRP)
- National Security Area (NSA)
- National tourism organization (NTO)
- National Transportation Safety Board (NTSB)
- Nautical Mile
- NAV/COM
- Navaid
- Naval
- NDB
- Negative static stability
- Negotiated Rate
- Net fare, net rate
- Net wholesale rate
- Neutral static stability
- Niche market
- Niche travel
- Nightlife
- NM
- No-frills
- No-gyro approach
- No procedure turn (NoPT)
- No show
- NOAA
- Non-Changeable Ticket
- Non-directional beacon (NDB)
- Non-refundable
- Non-Refundable Ticket
- Non Stop Flight
- Non-transferable
- Nondirectional beacon (NDB)
- Nondirectional radio beacon (NDB)
- Nonprecision approach
- Nonstop
- NoPT
- Normal category
- North Atlantic Tracks
- NOTAM
- NOTAMs
- Notice to Airmen (NOTAM)
- Notices to Airmen (NOTAMs)
- NRP
- NSA
- NTSB
- NWS
- OAS-Designated Routes
- OAT
- Objective and task method
- OBS
- Obstacle departure procedures (ODP)
- Obstruction lights
- Occluded front
- Occupancy
- Occupancy rate
- Ocean view cabin
- OCV
- ODP
- Off-peak
- Off-peak season
- Offline connection
- Offshore Operations
- Oil pressure gauge
- OM
- Omission error
- Omni bearing selector (OBS)
- On-site guide
- Onsite
- Open-end question
- Open jaw
- Open-jaw itinerary
- Open return
- Operated by DOI, Aircraft Operated by DOI
- Operating Agency
- Operating Cost
- Operating Handbook. Unless otherwise provided for, the aircraft is considered unairworthy if any of the listed equipment is inoperative. Estimated time enroute (ETE)
- Operating limitations
- Operational Control, Aircraft Under the Operational Control of DOI
- Operations
- Operator
- Optical illusion
- Option date
- Optionals
- Orientation
- Oshkosh
- OTA
- Otolith organ
- out this roughness.
- Outbound
- Outbound operator
- Outbound tour
- Outer marker
- Outside air temperature (OAT)
- Outside cabin
- Outside salesperson
- Overbanking tendency
- Overbook
- Overbooking
- Overboost
- Overcontrolling
- Overhead
- Overpower
- Override
- Overshoot
- Overstay
- P-factor
- P-static
- P-VASI
- Packaged travel
- Packing list
- panne
- PAPI
- PAR
- paraglider
- Parallels
- Parasite drag
- Passenger
- Passenger facility charge (PFC)
- Passenger name record (PNR)
- Passenger vessel
- Passport
- Passport/visa service
- Patio
- Patronage Program
- Pax
- Payload
- Payload (GAMA)
- Peak season
- Peninsula
- Per-capita costs
- Per-capita tour
- Per Diem
- Per pax
- Perceived value
- Personal effects coverage
- Personality
- Pet-friendly hotel
- PFD
- Phugoid oscillations
- PIC
- Pilot in Command
- Pilot in command (PIC)
- Pilot report (PIREP)
- Pilot’s information manual (PIM)
- Pilot’s Operating Handbook/Airplane Flight Manual (POH/AFM)
- Pilot’s operating handbook (POH)
- Pilot weather report (PIREP)
- Pilotage
- Pilots are expected to check appropriate NOTAMs during flight planning when conducting flight in an area where a temporary flight restriction is in effect.
- PIM
- PIREP
- Pitch
- Pitot pressure
- Pitot-static head
- Pitot Tube
- Plan view
- Planform
- Plunge pool
- Pneumatic
- POH
- POH/AFM
- Point-in-space approach
- Point-to-point
- Point-to-Point Flight
- Poor judgment chain
- port
- Port charges/taxes
- Port-Directional
- Port of Debarkation
- Port of Embarkation
- Port of entry
- Porter
- Porthole
- Posada
- Position error
- Position report
- Positioning flight
- Positioning strategy
- Positive Control
- Positive space
- Positive static stability
- Post-Cruise Vacation
- Power
- Power required curve
- powerplant
- PPDO
- Practical Test Standards (PTS)
- Pre- and post-trip tour
- Pre-Cruise Vacation
- Pre-deduct commission
- Pre-ignition
- Precautionary Landing
- Precession
- Precipitation
- Precipitation static (P-static)
- Precision approach
- Precision approach path indicator (PAPI)
- Precision approach radar (PAR)
- Precision Reconnaissance (including Fire Recon)
- Precision runway monitor (PRM)
- Preferred IFR routes
- Preferred Supplier
- Preferred Vendor
- Preformed group
- Preignition
- Premium-economy class
- Prepaid ticket advice
- pressure altitude
- Pressure demand oxygen system
- Pressurized Aircraft
- Prevailing visibility
- Preventive maintenance
- Primary and supporting
- Primary flight display
- Primary flight display (PFD)
- Primary radar
- Primary research
- Prime meridian
- Private parking
- Private tour
- Privately Owned Aircraft
- Prix fixe
- PRM
- Procedure turn
- Profile view
- Profit margin
- Prohibited area
- Promotion mix
- Promotional group tour
- Promotional partnership
- Prop
- Propeller
- Propeller/rotor modulation error
- Property
- Protection overbooking
- Pseudo-agent
- PST
- Psychographics
- PTS
- Public Aircraft
- Public relations (PR)
- Public tours
- Published fare
- Pull strategy
- Pulsating visual approach slope indicator (P-VASI)
- Purser
- Purser-(Airline)
- Push strategy
- QAR
- QFE
- QNH
- Quad
- Quadraplane
- Quay
- Queen size bed
- Query
- Quid
- Quiet Room
- Quota sample
- Rabbit, the
- Rack rate
- Radar
- Radar approach
- Radar Approach Control Facility
- Radar Approach Control Facility (RAPCON)
- Radar services
- Radar summary chart
- Radar weather report (SD)
- Radial
- Radials
- Radio frequency (RF)
- Radio magnetic indicator (RMI)
- Radio or radar altimeter
- Radio wave
- Radiosonde
- Rafting
- RAIM
- RAM recovery
- Ramp
- Random RNAV routes
- Range
- Ranging signals
- Rapid decompression
- Rate desk
- Rate of climb indicator
- Rating
- RB
- RBI
- RCO
- Reach
- Reasonable number
- Rebate (ing)
- Receiver autonomous integrity monitoring (RAIM)
- Receiver-transmitter (RT)
- Receptive operator
- Recommended altitude
- Reconfirm
- Record locator
- Red-eye flight
- Reduced vertical separation minimum (RVSM)
- Reference circle (also, distance circle)
- Referral agent/agency
- Region of reverse command
- Regions of command
- Registration certificate
- Registration number
- Registration / Tail Number
- Registry
- REIL
- Reissue
- Relationship marketing
- Relative bearing
- Relative bearing indicator (RBI)
- Relative bearing (RB)
- Relative humidity
- Relative wind
- Relocation cruise
- Remote communications outlet (RCO)
- Rental agreement
- Report Time
- Repositioning
- Repositioning flight
- Required navigation performance (RNP)
- Res
- Research constraints
- Reseller
- Reservation
- Reservation fee
- Resort
- Responsible tourism
- Restricted area
- Retail price
- Retail tour
- Retailer
- Retirement travel
- Reverse sensing
- RF
- Rhodopsin
- Rigging
- Rigidity
- Rigidity in space
- Rime ice
- Risk
- Risk elements
- Risk management
- RMI
- RNAV
- RNP
- Road trip
- Roll
- Rollaway
- Romantic Destinations
- Room Night
- Room Occupancy
- Room rates
- Rooming list
- Rotating beacon
- rotorcraft
- Round-the-world ticket
- Round trip
- RT
- Rudder
- Ruddervator
- ruddervators
- Run-of-house (ROH)
- Run-of-ship
- Run-of-the-house rate
- Runway
- Runway centerline lights
- Runway edge lights
- Runway end identifier lights (REIL)
- Runway End Safety Area (RESA)
- Runway (RWY)
- Runway visibility value (RVV)
- Runway visual range (RVR)
- RVR
- RVV
- SA
- Sabre®
- Safari
- Safaris
- Safety box
- sailplane
- Sales margin
- Sample
- Satellite ephemeris data
- Saturday night stay
- Scan
- Scandals tour
- Scheduled carrier
- Scheduled flights
- Scheduled tour
- SDF
- Sea bands
- Sea breeze
- Sea legs
- Sea level engine
- Second in command (SIC)
- Secondary information
- Secondary radar
- Sectional aeronautical chart
- Sectional aeronautical charts
- Sectioning system (GPS)
- See also step-on guide, city guide, on-site guide, and docent.
- Segment
- Segway
- Selective availability (SA)
- Self-drive
- Semicircular canal
- Semimonocoque
- Sensitive altimeter
- Series, Helicopter
- Serious Injury
- Service ceiling
- Service non comprise
- Servo
- Servo tab
- sesquiplane
- Shells
- Shopping arcade
- Shore
- Shore excursion
- Short field
- Short-haul flight
- Shoulder season
- Shuttle bus
- Sideslip
- Sidestick
- SIDS
- Sightseeing companies
- Sightseeing guide
- Sightseeing tour
- SIGMET
- Signal-to-noise ratio
- Significant Meteorological Information (SIGMET) –Issued to advise pilots of weather potentially hazardous to ALL categories aircraft.
- Significant weather prognostic
- Simple random sample
- Simplex
- Simplified directional facility (SDF)
- Single engine
- Single-pilot resource management (SRM)
- Single Room
- Single-Skid Landings
- Single Supplement
- Situational awareness
- Ski pass
- Ski piste
- Skid
- Skidding turn
- Skills and procedures
- Skin friction drag
- Slant range
- Slaved compass
- Sleeper
- Slip
- Slipping turn
- Slipstream effect
- Slot
- Small airplane
- Small Helicopter
- Smoking room
- Sneaky stalls
- Soft adventure
- Soft field
- Somatogravic illusion
- Sommelier
- Spa
- span
- Spatial disorientation
- Special event tour
- Special fare
- Special flight permit
- Special fuel consumption
- Special interest tour
- Special Use Activities
- Special use airspace
- Special Use Airspace (SUA)
- specific impulse
- Speed
- Spin
- Spiral instability
- Spiraling slipstream
- Split itinerary
- Split Ticket
- Spoilers
- Sports Tourism
- SPS
- SQUAWK
- Squelch
- SRM
- SSR
- SSV
- St
- stabilator
- Stability
- Stabilizer
- Stagnant hypoxia
- Stall
- Standard arrival route (STAR)
- Standard atmosphere
- Standard empty weight (GAMA)
- Standard holding pattern
- Standard instrument departure procedures (SIDS)
- Standard instrument departure route (SID)
- Standard Rate Turn
- Standard service volume (SSV)
- Standard terminal arrival route (STAR)
- Standard weights
- Standby
- STAR
- Star rating system
- Star Service
- starboard
- Stateroom
- Static longitudinal stability
- Static pressure
- Static stability
- Static vent
- Station
- Stationary front
- Staycation
- Steep turns
- Step-on guide
- Step-out Landings
- Stepdown fix
- Stern
- Stopover
- Straight and level flight
- Straight flight
- Strapdown system
- Strategic plan
- Stratoshere
- Stress
- Stress management
- Structural icing
- Student visa
- Subcontractor
- Sublimation
- Substantial Damage
- Suction relief valve
- Suite
- Supercharger
- Supercooled water droplets
- Supplier
- Surface
- Surface analysis chart
- SWOT analysis
- Synchro
- synchropter
- Synthetic vision
- T&E
- T-tail
- TAA
- TACAN
- Tactical Air Navigation System (TACAN)
- Tactical air navigation (TACAN)
- TAF
- Tail
- tailplane
- Takeoff decision speed (V1)
- Takeoff distance
- Takeoff safety speed (V2)
- Target market
- Tariff
- Tarmac
- TAS
- TAWS
- taxi
- taxiway
- Taxiway lights
- Taxiway turnoff lights
- TCAS
- TCH
- TDZE
- TEC
- Technique
- Telemarketing
- Telephone information briefing service (TIBS)
- Temporary flight restriction (TFR)
- Tender
- Tension
- terminal
- Terminal aerodrome forecast (TAF)
- Terminal area chart
- Terminal arrival area (TAA)
- Terminal instrument approach procedure (TERP)
- Terminal radar service areas (TRSA)
- TERP
- Terrace
- Terrain awareness and warning system (TAWS)
- Tetrahedron
- TFR
- TGV
- the point from which Latitude is measured, north or south. Equipment list
- Theme cruise
- Theme tour
- Thermosphere
- thickness
- Threshold
- Threshold crossing height (TCH)
- Throttle
- Through passenger
- Thrust
- Thrust (aerodynamic force)
- Thrust line
- Ticket service
- Ticket stock
- Tickler system
- Tiered override plan
- Tiered pricing
- Time and speed table
- Timed turn
- TIS
- Title 14 of the Code of Federal Regulations (14 CFR)
- Toe In Landings
- Torque
- Torquemeter
- Total drag
- Total drag curve
- Touch-and-Go
- Touchdown zone elevation (TDZE)
- Touchdown zone lights
- touchdown zone (TDZ)
- Tour
- Tour broker
- Tour catalog
- Tour Company
- Tour conductor
- Tour departure
- Tour desk
- Tour director
- Tour escort
- Tour guide
- Tour manager
- Tour manual
- Tour menu
- Tour operator
- Tour order
- Tour planner
- Tour rate
- Tour series
- Tourism
- Tourist
- Tourist card
- Tourist tax
- Tours
- Tower
- Tower (Controller)
- Tower En Route Control (TEC)
- TPP
- track
- Tracking
- Tracking study
- Traffic Alert and Collision Avoidance System (TCAS)
- Traffic Alert Collision Avoidance System (TCAS)
- Traffic information service (TIS)
- Trailing edge
- Train travel
- Trans-canal
- Transcon
- Transcontinental
- Transcribed Weather Broadcast (TWEB)
- Transfer
- Transient
- Transient Occupancy Tax
- Transit visa
- Transponder
- Transponder code
- Transportation
- Travel advisor
- Travel advisory
- Travel agency
- Travel agent
- Travel component
- Travel Destination
- Travel dictionary
- Travel Experience
- Travel Institute
- Travel Insurance
- Travel Itinerary
- Travel Policy
- Travel restrictions
- Travel rewards
- Travel scam
- Travel sickness
- Travel specialist
- Travel Tours
- Traveler
- Travelogues
- Trekking
- Trend
- Tri-colored VASI
- Tricycle gear
- Trim
- Trim Tab
- Trip director
- triplane
- Triple room
- Tropical destination
- Tropopause
- Troposphere
- True airspeed
- True airspeed (TAS)
- True altitude
- Trundle Bed
- Truss
- Turbine discharge pressure
- Turbine engine
- Turbocharger
- turbofan
- Turbofan engine
- Turbojet engine
- Turboprop engine
- Turboshaft engine
- Turbosuperchargers
- Turbulence
- Turn
- Turn-and-slip indicator
- Turn coordinator
- Turnaway
- Turndown service
- TWEB
- Twenty-four hour time
- Twin room
- TWR
- TWY
- U.S. aircraft by international agreement, and therefore precedes the other characters in the number.
- UHF
- Ulitimate load factor
- Ultra-high frequency (UHF)
- ultralight
- Unaccelerated flight
- Uncaging
- Uncontrolled Airspace
- Underpower
- UNESCO
- UNESCO World Heritage Sites
- UNICOM
- United States Terminal Procedures Publication (TPP)
- Unlimited mileage
- Unrestricted fare
- Unusual attitude
- Upgrade
- upon pilot request, timely weather information pertinent to their type of flight, route and altitude. Equator
- Upwind leg
- Urgent condition
- Useful Load
- User-defined waypoints
- USTOA
- UTC
- Utility category
- V-G diagram
- V Speed
- V speeds
- V-tail
- V1
- Value
- Value added tax (VAT)
- Value-based pricing
- Value season
- Vapor lock
- Variable costs
- Variance report
- Variation
- VASI
- VDP
- Vector
- Vectoring
- VEF
- Velocity
- Vendor
- Venturi tube
- Verandah
- Vertical axis
- Vertical card compass
- Vertical component of lift
- Vertical Speed
- Vertical Speed Indicator
- Vertical Speed Indicator (VSI)
- Vertical stability
- Vertical Stabilizer
- Very high frequency omni directional range (VOR)
- Very high frequency omnidirectional range
- Very High Frequency Omnidirectional Range (VOR)
- Very high frequency (VHF)
- Very High Frequency (VHF) Omni-Directional Range (VOR)
- Vestibule
- VFE
- VFR
- VFR On Top
- VFR over the top
- VFR terminal area chart
- VHF
- VHF omni test signal (VOT)
- VIA rail
- Victor airways
- Villas
- VIP experiences
- Visa
- Visa service
- Visual approach slope indicator (VASI)
- Visual descent point (VDP)
- Visual Flight Rules
- Visual flight rules (VFR)
- Visual Meteorological Conditions
- Visual Meteorological Conditions (VMC)
- VLE
- VLO
- VMC
- VNE
- VNO
- Voice activated transmission (VOX)
- Volume incentive
- Volume purchase
- Volunteer Service
- Voluntourism
- VOR
- VOR test facility (VOT)
- VORTAC
- VOT
- Voucher
- VOX
- Voyage
- VS0
- VS1
- VSI
- VX
- VY
- VYSE
- WAAS
- WAC
- Waitlist
- Waiver
- Wake turbulence
- Walk-up
- Wants
- Warm front
- Warning area
- WARP
- Waste gate
- Waypoint
- WCA
- Wearers claim that seasickness can be avoided by their use, thus eliminating the need for drugs such as Dramamine, etc.
- Weather and radar processor (WARP)
- Weather depiction chart
- Weight
- Weight and balance
- Weight-shift-control
- Wellness facilities
- Wellness Travel
- Wet bar
- wet lease
- Wholesale
- Wide area augmentation system (WAAS)
- Wide-Body Aircraft
- Wilco
- Wind correction angle (WCA)
- Wind direction indicators
- Wind Shear
- Wind tee
- Winds and temperature aloft forecast (FB)
- Windshear
- Wing
- Wing area
- Wing root
- Wing span
- Wing twist
- Wing walker
- Winglets
- Wings
- Wingtip vortices
- Word-of-mouth promotion
- Work
- Workaway
- World aeronautical chart (WAC)
- World Aeronautical Charts (WAC)
- World Heritage Area
- World Travel Guide
- Worldschooling
- WWOOF
- Wx
- XC
- Xolo
- YAW
- Yield management
- Yoke
- YOLO
- zeppelin
- Zone of confusion
- Zoo
- Zulu Time