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

Return flights

31 Jan - 04 Feb	Air Canada
31 Jan - 07 Feb	Air Canada
31 Jan - 12 Feb	Air Canada
31 Jan - 05 Feb	Air Canada
30 Jan - 31 Jan	United
30 Jan - 08 Feb	United
30 Jan - 04 Feb	United
30 Jan - 03 Feb	United
24 Jan - 31 Jan	T'way Air
29 Jan - 19 Feb	Korean Air	direct
30 Jan - 03 Feb	Asiana Airlines	direct
25 Jan - 27 Jan	T'way Air
31 Jan - 04 Feb	Korean Air	direct
29 Jan - 31 Jan	Delta	direct
27 Jan - 28 Jan	Air Canada
27 Jan - 31 Jan	Air Canada
26 Jan - 31 Jan	Air Canada
14 Jan - 18 Jan	United
20 Jan - 25 Jan	United
21 Jan - 29 Jan	United

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

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 Seoul to Seattle in January from 479€

Return flights