Cheapest return flights from Phoenix to Seattle in December from $192

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

Return flights

29 Dec - 05 Jan Frontier Airlines
30 Dec - 10 Jan Frontier Airlines
27 Dec - 10 Jan Frontier Airlines direct
27 Dec - 03 Jan Frontier Airlines direct
31 Dec - 10 Jan Alaska Airlines direct
31 Dec - 07 Jan Alaska Airlines direct
26 Dec - 05 Jan Frontier Airlines
26 Dec - 03 Jan Frontier Airlines
30 Dec - 02 Jan Frontier Airlines
30 Dec - 10 Jan Alaska Airlines direct
26 Dec - 31 Dec Frontier Airlines
24 Dec - 28 Dec Frontier Airlines
26 Dec - 29 Dec Frontier Airlines direct
24 Dec - 27 Dec Frontier Airlines
23 Dec - 28 Dec Frontier Airlines
26 Dec - 31 Dec Frontier Airlines direct
25 Dec - 25 Dec Alaska Airlines
25 Dec - 27 Dec Alaska Airlines direct
24 Dec - 28 Dec Alaska Airlines direct
23 Dec - 28 Dec Alaska Airlines direct

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

Powered by

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.

Book a cheap hotel in Seattle

Cheap car rent in Seattle

Feel free to contact us with any feedback or request another flight research.