Cheapest return flights from Seattle to Mexico City in May from $308

AirHint found the following cheapest return flights from Seattle (SEA) to Mexico City (MEX) in May 2026 (see full year).

Return flights

28 May - 04 Jun Volaris
10 May - 14 May Volaris
13 May - 10 Jun Volaris
07 May - 11 May Frontier Airlines
11 May - 25 May Frontier Airlines
24 May - 30 May Alaska Airlines
28 May - 04 Jun Aeromexico direct
11 May - 25 May Delta direct
10 May - 14 May Aeromexico direct
07 May - 11 May Delta direct
13 May - 10 Jun Aeromexico direct

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

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