AirHint found the following cheapest one-way flights from Seattle (SEA) to Cancun (CUN) in January 2026 (see full year).
One-Way flights
| 29 Jan | Aeromexico | direct | |
| 28 Jan | Delta | direct | |
| 05 Jan | Hawaiian Airlines | direct | |
| 04 Jan | Sun Country Airlines | ||
| 01 Jan | Sun Country Airlines |
Also check the deals for return flights from Seattle to Cancun in January.
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