Cheapest return flights from Seattle to Mexico City in December from $447

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

Return flights

04 Dec - 06 Dec Frontier Airlines
05 Dec - 13 Dec Hawaiian Airlines
13 Dec - 29 Dec Hawaiian Airlines
15 Dec - 11 Jan Hawaiian Airlines
10 Dec - 08 Jan Hawaiian Airlines
11 Dec - 27 Dec Alaska Airlines
14 Dec - 30 Dec Frontier Airlines
11 Dec - 26 Dec Volaris
11 Dec - 05 Jan Hawaiian Airlines
10 Dec - 04 Jan Hawaiian Airlines
13 Dec - 27 Dec Alaska Airlines
12 Dec - 04 Jan Hawaiian Airlines
22 Dec - 10 Jan Alaska Airlines
20 Dec - 29 Dec Alaska Airlines
03 Dec - 04 Jan Aeromexico
29 Dec - 03 Jan Volaris
29 Dec - 02 Jan Aeromexico
20 Dec - 01 Jan Alaska Airlines
05 Dec - 13 Dec Aeromexico direct
13 Dec - 27 Dec Aeromexico direct

Also check the deals for one-way flights from Seattle 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.

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