Cheapest return flights from Seattle to Seoul in January from $862

AirHint found the following cheapest return flights from Seattle (SEA) to Seoul (GMP) in January 2026 (see full year).

Return flights

11 Jan - 17 Jan Japan Airlines
04 Jan - 18 Feb Japan Airlines
12 Jan - 16 Feb Japan Airlines
26 Jan - 07 Feb Japan Airlines
13 Jan - 03 Feb Japan Airlines
14 Jan - 05 Feb Japan Airlines
22 Jan - 07 Feb Japan Airlines
28 Jan - 17 Feb Japan Airlines
07 Jan - 28 Jan Alaska Airlines
17 Jan - 24 Jan Alaska Airlines
05 Jan - 10 Jan EVA Air
05 Jan - 08 Jan Japan Airlines
02 Jan - 09 Jan ANA

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

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