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

Return flights

04 Dec - 11 Dec	jetBlue
05 Dec - 08 Dec	jetBlue
10 Dec - 10 Dec	Aeromexico
01 Dec - 10 Dec	Aeromexico
02 Dec - 09 Dec	Aeromexico
10 Dec - 09 Jan	Aeromexico
05 Dec - 09 Dec	Aeromexico
11 Dec - 14 Dec	Air Canada
23 Dec - 30 Dec	jetBlue
25 Dec - 29 Dec	Delta
25 Dec - 05 Jan	jetBlue
20 Dec - 01 Jan	jetBlue
25 Dec - 25 Dec	Aeromexico
29 Dec - 02 Jan	American Airlines
28 Dec - 02 Jan	jetBlue
24 Dec - 02 Jan	Southwest Airlines
26 Dec - 02 Jan	jetBlue

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.

Book a cheap hotel in Cancun

Cheap car rent in Cancun

Cheapest return flights from Washington to Cancun in December from $412

Return flights