AirHint found the following cheapest return flights from Seattle (SEA) to Cancun (CUN) in November 2025 (see full year).

Return flights

02 Nov - 08 Nov	Aeromexico
08 Nov - 14 Nov	Aeromexico
16 Nov - 19 Nov	Aeromexico	direct
15 Nov - 19 Nov	Aeromexico
08 Nov - 11 Nov	Frontier Airlines
01 Nov - 05 Nov	United
01 Nov - 04 Nov	United
13 Nov - 19 Nov	Aeromexico	direct
17 Nov - 22 Nov	Alaska Airlines
07 Nov - 14 Nov	Alaska Airlines
24 Nov - 01 Dec	Alaska Airlines
26 Nov - 01 Dec	Air Canada
24 Nov - 01 Dec	Delta	direct

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

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 November from $334

Return flights