Cheapest return flights from Seattle to Mexico City in December from $341

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

Return flights

04 Dec - 09 Dec Frontier Airlines
04 Dec - 07 Dec Frontier Airlines
12 Dec - 12 Jan Frontier Airlines
01 Dec - 12 Dec Frontier Airlines
29 Dec - 10 Jan Frontier Airlines
01 Dec - 03 Dec Aeromexico
09 Dec - 23 Dec Hawaiian Airlines
11 Dec - 16 Dec Frontier Airlines
15 Dec - 23 Dec Frontier Airlines
16 Dec - 23 Dec Hawaiian Airlines
15 Dec - 06 Jan Frontier Airlines
31 Dec - 08 Jan Volaris
12 Dec - 16 Dec Hawaiian Airlines
13 Dec - 20 Dec Frontier Airlines
12 Dec - 04 Jan Frontier Airlines
25 Dec - 02 Jan Hawaiian Airlines
26 Dec - 04 Jan Frontier Airlines
17 Dec - 04 Jan Hawaiian Airlines
23 Dec - 01 Jan Frontier Airlines
25 Dec - 01 Jan Hawaiian Airlines

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

Powered by

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.