| Outbound | Return | Airlines | Shop | Baggage | Price | ||
|---|---|---|---|---|---|---|---|
| Best option Denver St. Louis | Outbound 09/25/25 direct F93302 02h 06min | Return 10/05/25 direct F94567 02h 25min |  Frontier Airlines |  | $138 | ||
| Denver St. Louis | Outbound 09/25/25 direct F93302 02h 06min | Return 10/05/25 direct F94567 02h 25min | Frontier Airlines |  | $141 | ||
| Denver St. Louis | Outbound 09/25/25 direct F93302 02h 06min | Return 10/05/25 direct F94567 02h 25min | Frontier Airlines |  | ? | $161 | |
| Denver St. Louis | Outbound 09/25/25 direct F93302 02h 06min | Return 10/05/25 direct F94567 02h 25min | Frontier Airlines |  | $162 | ||
| Denver St. Louis | Outbound 09/25/25 direct F93302 02h 06min | Return 10/05/25 direct F94567 02h 25min | Frontier Airlines |  | ? | $179 | |
| Denver St. Louis | Outbound 09/25/25 direct UA5617 02h 13min | Return 10/05/25 direct UA5979 02h 38min |  United Airlines |  | ? | $267 | |
| Denver St. Louis | Outbound 09/25/25 1 Stopover (ORD) AA2451, AA2514 05h 11min | Return 10/05/25 1 Stopover (CLT) AA0858, AA1283 08h 44min |  American Airlines |  | ? | $437 | |
| Denver St. Louis | Outbound 09/25/25 1 Stopover (SEA) AS0535, AS0472 07h 57min | Return 10/05/25 1 Stopover (SEA) AS0473, AS0535 08h 33min |  Alaska Airlines |  | ? | $597 |
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 %