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

Return flights

10 Dec - 17 Dec	Alaska Airlines
09 Dec - 16 Dec	Delta
09 Dec - 12 Dec	Delta	direct
07 Dec - 12 Dec	Alaska Airlines
12 Dec - 19 Dec	Alaska Airlines
07 Dec - 12 Dec	Delta	direct
10 Dec - 17 Dec	Delta	direct
06 Dec - 21 Dec	Delta	direct
23 Dec - 26 Dec	Delta	direct
22 Dec - 26 Dec	Delta	direct
31 Dec - 04 Jan	Aeromexico
21 Dec - 10 Jan	Frontier Airlines
31 Dec - 03 Jan	Aeromexico
30 Dec - 04 Jan	Aeromexico
29 Dec - 03 Jan	Aeromexico
31 Dec - 04 Jan	Delta	direct
26 Dec - 04 Jan	Aeromexico
30 Dec - 04 Jan	Delta	direct
29 Dec - 02 Jan	United
29 Dec - 02 Jan	Delta	direct

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

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 Puerto Vallarta in December from 344€

Return flights