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

Return flights

16 Oct - 23 Oct	Air Canada
17 Oct - 21 Oct	Air Canada
31 Oct - 05 Nov	Air Canada
06 Oct - 12 Oct	United
13 Oct - 20 Oct	United
12 Oct - 21 Oct	United
24 Oct - 31 Oct	United
12 Oct - 22 Oct	United
01 Oct - 01 Nov	United
08 Oct - 17 Oct	United
02 Oct - 11 Oct	United
01 Oct - 11 Oct	United
01 Oct - 01 Nov	Korean Air	direct
31 Oct - 05 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 481€

Return flights