L
- lack of fuel
- land glider
- land gyroplane
- land helicopter
- land ornithoper
- land side
- land side operations
- landing
- landing area
- landing area level
- landing direction indicator
- landing distance available
- landing flare
- landing gear
- landing gear doors
- landing gear down-lock pin
- landing gear down lock pin
- landing light
- landing run
- landing strip
- landing surface
- landing threshold
- landing threshold point
- landing weight
- landplane
- landside operations
- lapse rate
- last-minute change
- lateral deviation
- lateral navigation
- lateral reference noise measurement point
- lateral vibration
- latitude
- layer
- lazy eight
- lead-in line
- lead-out line
- leading-edge radiator
- leading edge
- leading sweep
- leased aircraft
- lee wave
- left-handed propeller
- left-right indicator
- letter of approval
- level
- Level 1 airport
- Level 2 airport
- Level 3 airport
- life raft
- liferaft
- lifesaving equipment
- lift
- lift-off
- lift-off speed
- lift-to-drag ratio
- lift coefficient
- lifting equipment
- lifting loop
- lifting operation
- liftoff
- liftoff speed
- light-sport aircraft
- light aircraft
- lighter-than-air aircraft
- limit load
- line-squall
- line check
- line maintenance
- line of sight
- line oriented flying training
- line squall
- liner
- lista de equipo mínimo
- load classification number
- load factor
- load manifest
- load sheet
- local mean time
- local runway safety team
- local traffic
- localizer
- localizer performance with vertical guidance
- location sign
- log
- log book
- logbook
- long-haul fligt
- long-range navigation system
- long approach
- long landing
- long radius exit
- long range air navigation system
- longeron
- longitude
- longitudinal axis
- longitudinal stability
- longline
- loop
- loss of tail rotor effectiveness
- lost baggage
- lost luggage
- low-speed stall
- low-wing monoplane
- low cloud base
- low frequency
- low latitudes
- low pass
- low visibility procedures
- low visibility take-off
- lowest safe altitude
- lowest safety altitude
- loxodrome
- loxodromic curve
- luces de situación de la pista
- luggage