Cheapest return flights from Seattle to Cancun in December from $341

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

Return flights

06 Dec - 11 Dec Frontier Airlines
14 Dec - 21 Dec Frontier Airlines
14 Dec - 22 Dec Alaska Airlines
10 Dec - 15 Dec Alaska Airlines
09 Dec - 17 Dec Hawaiian Airlines
11 Dec - 21 Dec Sun Country Airlines
11 Dec - 20 Dec Sun Country Airlines
11 Dec - 19 Dec Sun Country Airlines
29 Dec - 05 Jan Frontier Airlines
03 Dec - 03 Dec Aeromexico
03 Dec - 08 Dec Aeromexico
26 Dec - 06 Jan Frontier Airlines
30 Dec - 04 Jan Volaris
28 Dec - 04 Jan Frontier Airlines
25 Dec - 01 Jan WestJet
31 Dec - 03 Jan Aeromexico
20 Dec - 04 Jan Frontier Airlines
29 Dec - 03 Jan Frontier Airlines
29 Dec - 02 Jan Frontier Airlines
25 Dec - 01 Jan Hawaiian Airlines direct

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

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