AirHint found the following cheapest return flights from Omaha (OMA) to Denver (DEN) in December 2025 (see full year).
Return flights
| 04 Dec - 12 Dec | Frontier Airlines | direct | |
| 05 Dec - 12 Dec | Frontier Airlines | direct | |
| 20 Dec - 23 Dec | Allegiant Air | ||
| 20 Dec - 23 Dec | United | direct | |
| 20 Dec - 27 Dec | Southwest Airlines | direct |
Also check the deals for one-way flights from Omaha to Denver in December.
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