Cheapest one-way flights from Washington to Cancun in December from $161

AirHint found the following cheapest one-way flights from Washington (IAD) to Cancun (CUN) in December 2025 (see full year).

One-Way flights

15 Dec Frontier Airlines
07 Dec Frontier Airlines
31 Dec Aeromexico
30 Dec Aeromexico
28 Dec Aeromexico
07 Dec United direct
15 Dec United direct
29 Dec Aeromexico
31 Dec United direct
30 Dec United direct

Also check the deals for return flights from Washington to Cancun in December.

Skyscanner

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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