| Outbound | Return | Airlines | Shop | Baggage | Price | ||
|---|---|---|---|---|---|---|---|
| Best option Denver St. Louis | Outbound 03/28/26 direct F93302 02h 14min | Return 04/25/26 direct F94567 02h 33min |  Frontier Airlines |  | $171 | ||
| Denver St. Louis | Outbound 03/28/26 direct F93302 02h 14min | Return 04/25/26 direct F94567 02h 33min | Frontier Airlines |  | ? | $179 | |
| Denver St. Louis | Outbound 03/28/26 direct F93302 02h 14min | Return 04/25/26 direct F94567 02h 33min | Frontier Airlines |  | ? | $193 | |
| Denver St. Louis | Outbound 03/28/26 direct F93302 02h 14min | Return 04/25/26 direct F94567 02h 33min | Frontier Airlines |  | ? | $206 | |
| Denver St. Louis | Outbound 03/28/26 direct F93302 02h 14min | Return 04/25/26 1 Stopover (SEA) AS0473, AS1332 10h 02min | Frontier Airlines |  | ? | $352 | |
| Denver St. Louis | Outbound 04/03/26 direct UA1422 02h 09min | Return 04/16/26 direct UA1415 02h 34min |  United Airlines | | ? | $390 | |
| Denver St. Louis | Outbound 04/03/26 direct UA1422 02h 09min | Return 04/16/26 direct UA1415 02h 34min | United Airlines |  | ? | $405 | |
| Denver St. Louis | Outbound 05/16/26 1 Stopover (ORD) AA2771, AA0418 08h 05min | Return 05/29/26 1 Stopover (ORD) AA2324, AA1744 05h 18min |  American Airlines |  | ? | $460 | |
| Denver St. Louis | Outbound 05/16/26 1 Stopover (PDX) AS0714, AS0338 08h 06min | Return 05/29/26 1 Stopover (SEA) AS0473, AS1332 09h 01min |  Alaska Airlines |  | ? | $555 | |
| Denver St. Louis | Outbound 05/16/26 direct F93302 02h 12min | Return 05/29/26 4 Stopovers (IAH, SJO, DFW, CLT) UA4028, UA2448, AA0320, AA0317, AA3156 63h 09min | Frontier Airlines | | ? | $659 |
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 %