Cheapest return flights from Seattle to Mexico City in December from $435

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

Return flights

02 Dec - 06 Dec Volaris
11 Dec - 11 Dec Aeromexico
11 Dec - 16 Dec Volaris
12 Dec - 16 Dec Alaska Airlines
12 Dec - 17 Dec Hawaiian Airlines
24 Dec - 06 Jan Hawaiian Airlines
23 Dec - 30 Dec Sun Country Airlines
20 Dec - 03 Jan Frontier Airlines
02 Dec - 06 Dec Delta direct
11 Dec - 16 Dec Delta direct
12 Dec - 16 Dec Aeromexico direct
12 Dec - 17 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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