Cheapest return flights from Seattle to Seoul in December from 625€

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

Return flights

02 Dec - 20 Dec Alaska Airlines
05 Dec - 16 Dec Alaska Airlines
04 Dec - 07 Dec Alaska Airlines
01 Dec - 15 Dec Air Canada
02 Dec - 12 Dec Alaska Airlines
09 Dec - 20 Dec Alaska Airlines
01 Dec - 12 Dec Air Canada
09 Dec - 21 Dec Alaska Airlines
05 Dec - 17 Dec Air Canada
09 Dec - 24 Dec Asiana Airlines
24 Dec - 14 Jan Korean Air
29 Dec - 07 Jan Korean Air direct
24 Dec - 14 Jan Delta direct
26 Dec - 06 Jan Alaska Airlines
11 Dec - 06 Jan Alaska Airlines
13 Dec - 08 Jan Hawaiian Airlines
25 Dec - 07 Jan Korean Air direct
17 Dec - 11 Jan Turkish Airlines
15 Dec - 05 Jan Hawaiian Airlines
24 Dec - 04 Jan Korean Air

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

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