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

Return flights

12 Feb - 19 Feb	Air Canada
16 Feb - 23 Feb	Air Canada
18 Feb - 25 Feb	Air Canada
15 Feb - 22 Feb	Air Canada
13 Feb - 20 Feb	Air Canada
13 Feb - 20 Feb	Korean Air	direct
15 Feb - 22 Feb	Korean Air	direct
12 Feb - 19 Feb	Asiana Airlines	direct
16 Feb - 23 Feb	Asiana Airlines	direct
18 Feb - 25 Feb	Asiana Airlines	direct

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

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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Cheapest return flights from Seattle to Seoul in February from 660€

Return flights