Cheapest return flights from Washington to Mexico City in December from $419

AirHint found the following cheapest return flights from Washington (IAD) to Mexico City (MEX) in December 2025 (see full year).

Return flights

05 Dec - 07 Dec Frontier Airlines
05 Dec - 07 Dec Aeromexico direct
30 Dec - 09 Jan Aeromexico
07 Dec - 17 Dec United direct
12 Dec - 12 Jan Frontier Airlines
09 Dec - 20 Dec Aeromexico
09 Dec - 20 Dec Delta direct
12 Dec - 12 Jan Aeromexico direct
20 Dec - 23 Dec Frontier Airlines
10 Dec - 15 Dec Delta direct
10 Dec - 16 Dec Delta direct
20 Dec - 04 Jan Frontier Airlines
30 Dec - 09 Jan Aeromexico direct
20 Dec - 05 Jan Frontier Airlines
12 Dec - 03 Jan Frontier Airlines
20 Dec - 23 Dec Aeromexico direct
17 Dec - 27 Dec Aeromexico direct
25 Dec - 01 Jan Frontier Airlines
19 Dec - 04 Jan Frontier Airlines
20 Dec - 05 Jan Aeromexico direct

Also check the deals for one-way flights from Washington to Mexico City 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.

Book a cheap hotel in Mexico City

Cheap car rent in Mexico City

Feel free to contact us with any feedback or request another flight research.