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

Return flights

08 Dec - 12 Dec	American Airlines
06 Dec - 17 Dec	Aeromexico
03 Dec - 17 Dec	Aeromexico
03 Dec - 10 Dec	Aeromexico
03 Dec - 12 Dec	Aeromexico
11 Dec - 17 Dec	jetBlue
03 Dec - 08 Dec	Aeromexico
15 Dec - 15 Jan	Aeromexico
05 Dec - 14 Dec	Aeromexico
04 Dec - 11 Dec	jetBlue
04 Dec - 08 Dec	jetBlue
31 Dec - 04 Jan	jetBlue
30 Dec - 04 Jan	Aeromexico
24 Dec - 08 Jan	Delta
22 Dec - 06 Jan	jetBlue
22 Dec - 05 Jan	jetBlue
19 Dec - 10 Jan	Delta
21 Dec - 05 Jan	jetBlue
24 Dec - 01 Jan	jetBlue
25 Dec - 01 Jan	Delta

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