Cheapest return flights from Seattle to Seoul in January from $745

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

Return flights

17 Jan - 25 Jan Alaska Airlines
13 Jan - 25 Jan Alaska Airlines
10 Jan - 31 Jan Frontier Airlines
17 Jan - 31 Jan Alaska Airlines
12 Jan - 22 Jan Alaska Airlines
18 Jan - 01 Feb Alaska Airlines
21 Jan - 04 Feb Air Canada
12 Jan - 19 Jan Air Canada
26 Jan - 28 Jan Air Canada
12 Jan - 26 Jan Air Canada
12 Jan - 16 Feb Air Canada
20 Jan - 03 Feb Air Canada
27 Jan - 03 Feb Air Canada
12 Jan - 25 Jan WestJet
31 Jan - 09 Feb Air Canada
12 Jan - 19 Jan Asiana Airlines direct
18 Jan - 01 Feb Asiana Airlines direct
21 Jan - 04 Feb Korean Air direct
31 Jan - 09 Feb Delta direct
18 Jan - 27 Feb Delta direct

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

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