Cheapest one-way flights from Seattle to Mexico City in September from $152

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

One-Way flights

14 Sep Volaris
21 Sep Volaris
17 Sep Volaris
30 Sep Hawaiian Airlines
25 Sep Frontier Airlines
26 Sep Frontier Airlines
24 Sep Frontier Airlines
12 Sep Frontier Airlines
13 Sep Volaris
15 Sep Frontier Airlines

Also check the deals for return flights from Seattle to Mexico City in September.

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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