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

Return flights

01 Dec - 09 Dec	Aeromexico
10 Dec - 15 Dec	Aeromexico
11 Dec - 18 Dec	Frontier Airlines
12 Dec - 15 Dec	Frontier Airlines
03 Dec - 08 Dec	Volaris
03 Dec - 08 Dec	United	direct
10 Dec - 15 Dec	United	direct
16 Dec - 21 Dec	Delta
11 Dec - 13 Dec	Viva
09 Dec - 13 Dec	Viva
28 Dec - 02 Jan	Frontier Airlines	direct
26 Dec - 02 Jan	Frontier Airlines	direct
16 Dec - 05 Jan	Viva
18 Dec - 05 Jan	Viva
16 Dec - 02 Jan	Viva
18 Dec - 02 Jan	Viva

Also check the deals for one-way flights from Denver to Cancun 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 Denver to Cancun in December from 332€

Return flights