| 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 10/10/25 direct F93302 02h 07min | Return 11/04/25 direct F94567 02h 28min | Frontier Airlines | | ? | $156 | |
| 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 | |
| Denver St. Louis | Outbound 10/18/25 direct UA5617 02h 13min | Return 11/17/25 direct UA1396 02h 22min | United Airlines |  | ? | $220 | |
| Denver St. Louis | Outbound 09/04/25 direct UA5617 02h 13min | Return 09/28/25 1 Stopover (ORD) UA1156, UA2296 06h 48min | United Airlines | | ? | $228 | |
| Denver St. Louis | Outbound 10/18/25 1 Stopover (CLT) AA3299, AA2497 07h 09min | Return 11/17/25 1 Stopover (DFW) AA1363, AA0577 06h 45min |  American Airlines |  | ? | $233 |
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 %