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

Return flights

29 Dec - 02 Jan	Frontier Airlines	direct
27 Dec - 30 Dec	Frontier Airlines	direct
31 Dec - 07 Jan	Allegiant Air
31 Dec - 07 Jan	United	direct
27 Dec - 28 Dec	Frontier Airlines
31 Dec - 04 Jan	Allegiant Air
28 Dec - 02 Jan	Allegiant Air
31 Dec - 04 Jan	United	direct
28 Dec - 04 Jan	Allegiant Air
28 Dec - 02 Jan	Southwest Airlines	direct
28 Dec - 04 Jan	United	direct
28 Dec - 01 Jan	Southwest Airlines	direct
27 Dec - 28 Dec	Southwest Airlines	direct

Also check the deals for one-way flights from Des Moines 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 Des Moines to Denver in December from $308

Return flights