- LA (LATAM)
- LAS (Las Vegas Harry Reid)
- Late Checkout Game
- LAX (Los Angeles International)
- Layover
- Layover Justification
- L Fare
- LGA (New York LaGuardia)
- LH (Lufthansa)
- LHRC
- LHR (London Heathrow)
- LifeMiles
- Lifetime Status
- Lifetime Status Tunnel Vision
- Liquidation
- Liquidation Chain
- Load Balancing
- Load Factor
- Lounge Access
- Lounge Dependency
- Lounge FOMO
- Lounge Hopper
- Loungemaxxer
- Lounge Superiority Complex
- Loyalty Stockholm Syndrome
- LTD
- LX (SWISS)
