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

Return flights

02 Dec - 04 Dec	Delta
15 Dec - 18 Dec	Delta
30 Dec - 06 Jan	Delta
03 Dec - 08 Dec	Delta
12 Dec - 14 Dec	Delta
04 Dec - 08 Dec	Delta
24 Dec - 29 Dec	Delta
31 Dec - 05 Jan	jetBlue
23 Dec - 27 Dec	Delta
31 Dec - 04 Jan	jetBlue
30 Dec - 02 Jan	Southwest Airlines
27 Dec - 01 Jan	Southwest Airlines
30 Dec - 03 Jan	Southwest Airlines
30 Dec - 04 Jan	Southwest Airlines
26 Dec - 30 Dec	Delta
22 Dec - 30 Dec	Air Canada

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 397€

Return flights