| Outbound | Return | Airlines | Shop | Baggage | Price | ||
|---|---|---|---|---|---|---|---|
| Best option Denver St. Louis | Outbound 11/03/25 direct F93302 02h 07min | Return 11/12/25 direct F94567 02h 28min |  Frontier Airlines |  | ? | $119 | |
| Denver St. Louis | Outbound 11/03/25 direct F93302 02h 07min | Return 11/12/25 direct F94567 02h 28min | Frontier Airlines |  | $127 | ||
| Denver St. Louis | Outbound 11/03/25 direct F93302 02h 07min | Return 11/12/25 direct F94567 02h 28min | Frontier Airlines |  | $133 | ||
| Denver St. Louis | Outbound 11/03/25 direct F93302 02h 07min | Return 11/12/25 direct F94567 02h 28min | Frontier Airlines |  | $134 | ||
| Denver St. Louis | Outbound 06/18/25 direct F93302 02h 12min | Return 07/15/25 1 Stopover (LAS) F92017, F94612 09h 42min | Frontier Airlines | | $185 | ||
| Denver St. Louis | Outbound 06/18/25 direct F93302 02h 12min | Return 07/15/25 1 Stopover (DFW) AA1363, AA0662 07h 15min | Frontier Airlines |  | ? | $190 | |
| Denver St. Louis | Outbound 06/18/25 direct F93302 02h 12min | Return 07/15/25 1 Stopover (LAS) F92017, F94612 09h 42min | Frontier Airlines | | $195 | ||
| Denver St. Louis | Outbound 06/07/25 direct WN2814 02h 00min | Return 06/23/25 direct F94567 02h 27min |  Southwest Airlines | | ? | $209 | |
| Denver St. Louis | Outbound 10/18/25 direct UA5617 02h 13min | Return 11/17/25 direct UA2132 02h 20min |  United Airlines |  | ? | $214 | |
| Denver St. Louis | Outbound 09/04/25 direct UA0652 02h 03min | Return 09/28/25 1 Stopover (ORD) UA1156, UA2296 06h 48min | United Airlines | | ? | $216 |
Tips and tricks to help you find cheap flights from Denver to St. Louis
Favorite airline: Frontier Airlines
Flight tickets on the route Denver – St. Louis are most frequently booked with Frontier Airlines.
Frontier Airlines
62 %
United Airlines
38 %