Cheapest one-way flights from Seattle to Mexico City in December from $221

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

One-Way flights

14 Dec Frontier Airlines
15 Dec Hawaiian Airlines
13 Dec Volaris
16 Dec Hawaiian Airlines
17 Dec Hawaiian Airlines
13 Dec Aeromexico direct
15 Dec Aeromexico direct
16 Dec Aeromexico direct
17 Dec Aeromexico direct

Also check the deals for return 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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