Cheapest one-way flights from Seattle to Cancun in December from $189

AirHint found the following cheapest one-way flights from Seattle (SEA) to Cancun (CUN) in December 2025 (see full year).

One-Way flights

15 Dec Aeromexico direct
05 Dec Delta direct
11 Dec Sun Country Airlines
07 Dec Sun Country Airlines
21 Dec Sun Country Airlines
23 Dec Sun Country Airlines
22 Dec Sun Country Airlines
19 Dec Sun Country Airlines
26 Dec Air Canada
26 Dec Hawaiian Airlines direct

Also check the deals for return flights from Seattle to Cancun in December.

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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