AirHint found the following cheapest return flights from Seattle (SEA) to Seoul (ICN) in November 2025 (see full year).

Return flights

06 Nov - 11 Nov	Air Canada
10 Nov - 17 Nov	Air Canada
26 Nov - 03 Dec	Air Canada
02 Nov - 14 Nov	Air Canada
25 Nov - 05 Dec	Air Canada
05 Nov - 14 Nov	Air Canada
27 Nov - 30 Nov	Air Canada
06 Nov - 11 Nov	Delta	direct
10 Nov - 17 Nov	Delta	direct
15 Nov - 23 Nov	Delta	direct
07 Nov - 14 Nov	Delta	direct
02 Nov - 14 Nov	Delta	direct
28 Nov - 07 Dec	Air Canada
26 Nov - 03 Dec	Korean Air	direct
25 Nov - 05 Dec	Delta	direct
28 Nov - 07 Dec	Asiana Airlines	direct

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

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 November from 681€

Return flights