Cheapest return flights from Washington to Mexico City in December from $470

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

Return flights

29 Dec - 15 Jan Frontier Airlines
30 Dec - 08 Jan Frontier Airlines
30 Dec - 09 Jan Frontier Airlines
31 Dec - 14 Jan Aeromexico direct
29 Dec - 07 Jan Frontier Airlines
29 Dec - 08 Jan Frontier Airlines
31 Dec - 07 Jan Aeromexico direct
23 Dec - 13 Jan Frontier Airlines
30 Dec - 05 Jan Air Canada
25 Dec - 09 Jan Aeromexico
24 Dec - 28 Dec Aeromexico
18 Dec - 21 Dec Avianca
20 Dec - 25 Dec Frontier Airlines
21 Dec - 25 Dec Frontier Airlines
19 Dec - 22 Dec Allegiant Air
27 Dec - 30 Dec Frontier Airlines
22 Dec - 25 Dec Aeromexico
20 Dec - 26 Dec Frontier Airlines
20 Dec - 28 Dec Frontier Airlines
20 Dec - 29 Dec Avianca

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

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