| 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 07/26/26 1 Stopover (ATL) F93294, F94473 23h 47min | Return 08/05/26 direct F94567 02h 40min | Frontier Airlines | | ? | $363 | |
| Denver St. Louis | Outbound 07/26/26 1 Stopover (ORD) UA1377, UA1355 05h 11min | Return 08/05/26 direct UA0362 02h 22min |  United Airlines | | ? | $407 | |
| Denver St. Louis | Outbound 03/28/26 direct UA1422 02h 06min | Return 04/25/26 direct UA1415 02h 33min | United Airlines |  | ? | $411 | |
| Denver St. Louis | Outbound 07/26/26 1 Stopover (ATL) F91450, F94473 06h 48min | Return 08/05/26 direct F94567 02h 40min | Frontier Airlines |  | $414 | ||
| Denver St. Louis | Outbound 07/26/26 1 Stopover (ORD) UA1377, UA1355 05h 11min | Return 08/05/26 direct UA2459 02h 23min | United Airlines | | ? | $432 |
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 %