| name | Hub | image | date Ceased operations | date Commenced operations | IATA Code | ICAO Code | city Headquarters | administrative division Headquarters | country Headquarters | continent Headquarters | Country | continent | Parent | number of aircrafts | number of destinations | Website |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Aspen Airways | 1989 | 1952 | AP | ASP | Denver | Colorado | United States | Americas | United States | Americas | Website | |||||
| Frontier Airlines | Denver International Airport |  | 05/07/1994 | F9 | FFT | Denver | Colorado | United States | Americas | United States | Americas | Republic Airways Holdings | 65 | 65 | Website | |
| Key Lime Air | Centennial Airport | 1997 | KG | LYM | Englewood, Colorado | Colorado | United States | Americas | United States | Americas | 42 | 5 | Website | |||
| Lynx Aviation | Denver International Airport | 2011 | 2006 | Denver | Colorado | United States | Americas | Republic Airways Holdings | 4 | 4 | Website | |||||
| Mountain Air Cargo | 1974 | C2 | airline | Denver | Colorado | United States | Americas | United States | Americas | 57 | Website |