AirHint found the following cheapest return flights from Seattle (SEA) to Cancun (CUN) in January 2026 (see full year).

Return flights

12 Jan - 15 Jan	Volaris
23 Jan - 26 Jan	Aeromexico
04 Jan - 22 Jan	Alaska Airlines	direct
23 Jan - 26 Jan	Aeromexico	direct
12 Jan - 15 Jan	Aeromexico	direct
17 Jan - 21 Jan	Aeromexico
17 Jan - 21 Jan	Delta	direct
17 Jan - 24 Jan	Delta	direct
17 Jan - 25 Jan	Delta	direct
17 Jan - 20 Jan	Aeromexico

Also check the deals for one-way flights from Seattle to Cancun in January.

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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Cheapest return flights from Seattle to Cancun in January from $329

Return flights