Frontier Airlines
Airline based in United States
Airline facts
- IATA code
- F9
- ICAO code
- FTT
- Callsign
- FRONTIER FLIGHT
- Country
- United States
- Alliance
- None
- Website
- flyfrontier.com
Frontier Airlines seat maps
Frontier Airlines routes in the US
Frontier Airlines flew from 103 airports to, from or within the United States between August 2025 and July 2026. Busiest routes:
- MCO to SJUOrlando to San Juan · 34 a week
- DEN to LASDenver to Las Vegas · 33 a week
- MCO to PHLOrlando to Philadelphia · 31 a week
- DEN to PHXDenver to Phoenix · 27 a week
- DEN to DFWDenver to Dallas-Fort Worth · 25 a week
- ATL to PHLAtlanta to Philadelphia · 25 a week
- ATL to MCOAtlanta to Orlando · 25 a week
- CLE to MCOCleveland to Orlando · 24 a week
- ATL to BWIAtlanta to Baltimore · 24 a week
- ATL to DFWAtlanta to Dallas-Fort Worth · 21 a week
- DEN to SLCDenver to Salt Lake City · 21 a week
- ATL to TPAAtlanta to Tampa · 20 a week
- ATL to MIAAtlanta to Miami · 20 a week
- CLE to TPACleveland to Tampa · 20 a week
- ATL to DENAtlanta to Denver · 20 a week
- DFW to MCODallas-Fort Worth to Orlando · 20 a week
- ATL to IAHAtlanta to Houston · 20 a week
- ATL to FLLAtlanta to Fort Lauderdale · 20 a week
- LAS to SFOLas Vegas to San Francisco · 20 a week
- PHL to SJUPhiladelphia to San Juan · 19 a week
- DEN to MCODenver to Orlando · 19 a week
- DCA to DENWashington to Denver · 18 a week
- DEN to IAHDenver to Houston · 18 a week
- BWI to MCOBaltimore to Orlando · 18 a week
- DFW to LASDallas-Fort Worth to Las Vegas · 18 a week
- LAS to LAXLas Vegas to Los Angeles · 17 a week
- CLT to MCOCharlotte to Orlando · 17 a week
- ATL to LGAAtlanta to New York · 16 a week
- DEN to LAXDenver to Los Angeles · 16 a week
- DEN to SFODenver to San Francisco · 15 a week
Frontier Airlines hubs
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