- F9 (Frontier Airlines)
- Fare Basis Code
- Fare Bucket
- Fare Bucket Vision
- Fare Class
- FCO (Rome Fiumicino)
- FCS
- F Fare
- FHR
- FIFO Flyer
- Fifth Freedom Flight
- Filed Fare
- FIM
- Finnair Plus
- First Class (F)
- First Wing
- FJ (Fiji Airways)
- FLT
- FLUB
- FlyerTalk Famous
- FlyerTalk (FT)
- Flying Blue
- fly the friendly skies
- FNA (Free Night Award)
- FNC
- Forex / FX Fee
- Four Seasons (FS)
- FRA (Frankfurt)
- Free Flight Inflation
- Free Spirit
- Frontier Miles
- FT
- FT Effect
- Fuel Dump
- Fuel Surcharge (YQ)
- Full Fare
- Future Flight Credit (FFC)
