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

Return flights

15 Dec - 16 Dec	Delta
12 Dec - 20 Dec	Delta
15 Dec - 22 Dec	Delta
05 Dec - 12 Dec	Delta
06 Dec - 12 Dec	Delta
11 Dec - 17 Dec	Aeromexico
16 Dec - 21 Dec	Aeromexico
06 Dec - 13 Dec	Delta
05 Dec - 14 Dec	Delta
05 Dec - 08 Dec	Air Canada
31 Dec - 05 Jan	Delta
31 Dec - 04 Jan	Aeromexico
26 Dec - 09 Jan	Frontier Airlines
30 Dec - 03 Jan	Aeromexico
31 Dec - 03 Jan	Aeromexico
28 Dec - 03 Jan	Frontier Airlines
23 Dec - 03 Jan	Frontier Airlines

Also check the deals for one-way flights from Washington 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 Washington to Cancun in December from 285€

Return flights