AirHint found the following cheapest one-way flights from Tulsa (TUL) to Denver (DEN) in October 2025 (see full year).
One-Way flights
| 30 Oct | Frontier Airlines | direct | |
| 31 Oct | Allegiant Air | ||
| 27 Oct | Allegiant Air | ||
| 31 Oct | Southwest Airlines | direct | |
| 27 Oct | Southwest Airlines | direct |
Also check the deals for return flights from Tulsa to Denver in October.
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