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

Return flights

11 Dec - 14 Dec	Air Canada
11 Dec - 16 Dec	Air Canada
06 Dec - 13 Dec	Air Canada
02 Dec - 09 Dec	Air Canada
05 Dec - 14 Dec	Frontier Airlines
04 Dec - 07 Dec	Frontier Airlines
15 Dec - 19 Dec	Air Canada
14 Dec - 23 Dec	Air Canada
30 Dec - 09 Jan	Air Canada
03 Dec - 07 Dec	United
04 Dec - 08 Dec	Frontier Airlines
16 Dec - 18 Jan	Southwest Airlines
30 Dec - 06 Jan	Southwest Airlines
13 Dec - 06 Jan	Air Canada
30 Dec - 04 Jan	Aeromexico
29 Dec - 03 Jan	Aeromexico
30 Dec - 03 Jan	Aeromexico
31 Dec - 04 Jan	Aeromexico
26 Dec - 05 Jan	Air Canada
28 Dec - 02 Jan	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.

Book a cheap hotel in Cancun

Cheap car rent in Cancun

Cheapest return flights from Washington to Cancun in December from 354€

Return flights