AirHint found the following cheapest return flights from Omaha (OMA) to Denver (DEN) in December 2025 (see full year).

Return flights

11 Dec - 08 Jan	Frontier Airlines	direct
05 Dec - 07 Dec	Frontier Airlines	direct
25 Dec - 01 Jan	Frontier Airlines	direct
11 Dec - 15 Dec	Frontier Airlines
11 Dec - 15 Dec	Southwest Airlines	direct
12 Dec - 15 Dec	Southwest Airlines	direct
20 Dec - 23 Dec	Southwest Airlines	direct
31 Dec - 03 Jan	Southwest Airlines	direct

Also check the deals for one-way flights from Omaha to Denver in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Omaha to Denver in December from $66

Return flights