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

Return flights

30 Nov - 09 Dec	Japan Airlines
30 Nov - 11 Dec	Japan Airlines
28 Nov - 08 Dec	Japan Airlines
28 Nov - 06 Dec	Japan Airlines
10 Nov - 15 Nov	EVA Air
11 Nov - 18 Nov	Alaska Airlines
20 Nov - 28 Nov	Japan Airlines
19 Nov - 28 Nov	Japan Airlines
27 Nov - 07 Dec	ANA
17 Nov - 05 Dec	ANA
17 Nov - 08 Dec	ANA
27 Nov - 20 Dec	Japan Airlines
27 Nov - 11 Dec	Japan Airlines
17 Nov - 25 Nov	ANA
13 Nov - 19 Nov	Japan Airlines
24 Nov - 07 Dec	China Airlines
19 Nov - 26 Nov	Japan Airlines
16 Nov - 29 Nov	Japan Airlines
22 Nov - 29 Nov	Japan Airlines
21 Nov - 26 Nov	ANA

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 $881

Return flights