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

Return flights

24 Oct - 31 Oct	Air Canada
13 Oct - 31 Oct	Air Canada
06 Oct - 12 Oct	Air Canada
10 Oct - 24 Oct	Air Canada
24 Oct - 09 Nov	Air Canada
16 Oct - 01 Nov	Air Canada
26 Oct - 31 Oct	United
14 Oct - 21 Oct	United
01 Oct - 04 Oct	United
08 Oct - 18 Oct	United
03 Oct - 13 Oct	United
12 Oct - 23 Nov	United
08 Oct - 17 Oct	United
12 Oct - 23 Nov	Asiana Airlines	direct
16 Oct - 01 Nov	Korean Air	direct
24 Oct - 09 Nov	Korean Air	direct

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

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 October from $555

Return flights