Cheapest return flights from Seattle to Seoul in December from $873

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

Return flights

23 Dec - 17 Jan Japan Airlines
09 Dec - 21 Dec Japan Airlines
15 Dec - 26 Dec Japan Airlines
02 Dec - 20 Dec Japan Airlines
15 Dec - 22 Dec Japan Airlines
15 Dec - 23 Dec Japan Airlines
23 Dec - 14 Jan Japan Airlines
09 Dec - 14 Jan Japan Airlines
08 Dec - 06 Jan Japan Airlines
09 Dec - 06 Jan Japan Airlines
14 Dec - 26 Dec Japan Airlines
16 Dec - 14 Jan Japan Airlines
07 Dec - 21 Dec Japan Airlines
29 Dec - 15 Jan Japan Airlines
11 Dec - 17 Dec Alaska Airlines
22 Dec - 14 Jan Alaska Airlines
30 Dec - 15 Jan Japan Airlines
15 Dec - 27 Dec Japan Airlines
11 Dec - 14 Dec Japan Airlines
29 Dec - 16 Jan Japan Airlines

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

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