- Frontier Airlines ATL Terminal – Atlanta International Airport
- Frontier Airlines AUS Terminal – Austin–Bergstrom International Airport
- Frontier Airlines AZA Terminal – Phoenix-Mesa Gateway Airport
- Frontier Airlines EUG Terminal – Eugene Airport
- Frontier Airlines EWR Terminal – Newark Liberty Airport
- Frontier Airlines FLL Terminal – Fort Lauderdale-Hollywood Airport
- Frontier Airlines GRR Terminal – Gerald R. Ford International Airport
- Frontier Airlines IAD Terminal – Dulles International Airport
- Frontier Airlines IAH Terminal – George Bush Intercontinental Airport
- Frontier Airlines IND Terminal – Indianapolis International Airport
- Frontier Airlines JAX Terminal – Jacksonville International Airport
- Frontier Airlines KUL Terminal – Kuala Lumpur Airport
- Frontier Airlines LAX Terminal – Los Angeles Airport
- Frontier Airlines LGA Terminal – LaGuardia Airport
- Frontier Airlines LIR Terminal – Daniel Oduber Quirós International Airport
- Frontier Airlines LOS Terminal – Murtala Muhammed Airport
- Frontier Airlines MCO Terminal – Orlando Airport
- Frontier Airlines MEX Terminal – Mexico City International Airport
- Frontier Airlines NAS Terminal – Lynden Pindling International Airport
- Frontier Airlines OAK Terminal – Oakland International Airport
- Frontier Airlines OKC Terminal – Will Rogers World Airport
- Frontier Airlines ONT Terminal – Ontario International Airport
- Frontier Airlines ORL Terminal – Orlando Executive Airport
- Frontier Airlines PHL Terminal – Philadelphia Airport
- Frontier Airlines PIT Terminal – Pittsburgh International Airport
- Frontier Airlines PUB Terminal – Pueblo Memorial Airport
- Frontier Airlines PVD Terminal – Rhode Island T. F. Green International Airport
- Frontier Airlines RDU Terminal – Raleigh-Durham Airport
- Frontier Airlines RFD Terminal – Chicago Rockford Airport
- Frontier Airlines RSW Terminal – Southwest Florida International Airport
- Frontier Airlines SAN Terminal – San Diego Airport
- Frontier Airlines SAT Terminal – San Antonio International Airport
- Frontier Airlines TYS Terminal – McGhee Tyson Airport