| Outbound | Return | Airlines | Shop | Baggage | Price | ||
|---|---|---|---|---|---|---|---|
| Best option 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 04/03/26 direct F93302 02h 12min | Return 04/16/26 1 Stopover (SEA) AS0314, AS0642 09h 38min |  Frontier Airlines |  | ? | $422 | |
| Denver St. Louis | Outbound 04/03/26 1 Stopover (CLT) AA2556, AA2937 07h 39min | Return 04/16/26 1 Stopover (ORD) AA2444, AA1647 04h 42min |  American Airlines |  | ? | $554 | |
| Denver St. Louis | Outbound 04/03/26 1 Stopover (CLT) AA1623, AA2477 09h 01min | Return 04/16/26 1 Stopover (DFW) AA1410, AA1756 04h 55min | American Airlines |  | ? | $1,084 | |
| Denver St. Louis | Outbound 04/03/26 1 Stopover (LAS) F91765, F93108 08h 48min | Return 04/16/26 3 Stopovers (BOS, LHR, ORD) IB4924, IB4027, BA1546, BA2421 31h 14min | Frontier Airlines |  | ? | $1,464 |
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 %