AirHint found the following cheapest one-way flights from Seattle (SEA) to Mexico City (MEX) in January 2026 (see full year).
One-Way flights
| 28 Jan | Volaris | ||
| 07 Jan | Volaris | ||
| 01 Jan | Frontier Airlines | ||
| 01 Jan | Aeromexico | direct | |
| 28 Jan | Aeromexico | direct | |
| 23 Jan | Aeromexico | direct | |
| 14 Jan | United | ||
| 07 Jan | Aeromexico | direct |
Also check the deals for return flights from Seattle to Mexico City in January.
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