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

Return flights

03 Nov - 13 Nov	Air Canada
27 Nov - 30 Dec	Air Canada
26 Nov - 30 Dec	Air Canada
27 Nov - 30 Nov	Air Canada
11 Nov - 21 Nov	Air Canada
11 Nov - 22 Nov	Air Canada
22 Nov - 30 Nov	Air Canada
14 Nov - 23 Nov	Air Canada
07 Nov - 16 Nov	Air Canada
07 Nov - 14 Nov	Air Canada
14 Nov - 23 Nov	Delta	direct
21 Nov - 07 Dec	Delta	direct
11 Nov - 21 Nov	Delta	direct
27 Nov - 30 Dec	Korean Air	direct
26 Nov - 30 Dec	Korean Air	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 687€

Return flights