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

Return flights

04 Dec - 07 Dec	Air Canada
02 Dec - 05 Dec	Delta
01 Dec - 04 Dec	Air Canada
11 Dec - 14 Dec	Air Canada
04 Dec - 08 Dec	Delta
18 Dec - 25 Dec	Southwest Airlines
25 Dec - 31 Dec	Southwest Airlines
24 Dec - 01 Jan	Southwest Airlines
19 Dec - 26 Dec	Southwest Airlines
20 Dec - 27 Dec	Southwest Airlines
28 Dec - 02 Jan	Southwest Airlines
24 Dec - 02 Jan	Southwest Airlines
25 Dec - 02 Jan	Southwest Airlines
29 Dec - 03 Jan	Southwest Airlines
27 Dec - 02 Jan	Southwest Airlines
27 Dec - 03 Jan	Southwest 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 332€

Return flights