Cheapest one-way flights from Seattle to Seoul in January from $400

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

One-Way flights

18 Jan Frontier Airlines
13 Jan Air Canada
10 Jan Frontier Airlines
17 Jan Alaska Airlines
24 Jan Alaska Airlines
23 Jan Frontier Airlines
12 Jan WestJet
15 Jan Asiana Airlines direct
12 Jan Asiana Airlines direct
13 Jan Asiana Airlines direct

Also check the deals for return flights from Seattle to Seoul in January.

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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.

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