Cheapest one-way flights from Seattle to Seoul in December from $461

AirHint found the following cheapest one-way flights from Seattle (SEA) to Seoul (GMP) in December 2025 (see full year).

One-Way flights

06 Dec Japan Airlines
03 Dec Japan Airlines
01 Dec American Airlines
04 Dec Japan Airlines
30 Dec Hainan Airlines
10 Dec Japan Airlines
16 Dec Japan Airlines
31 Dec Philippine Airlines
28 Dec ANA
22 Dec Japan Airlines

Also check the deals for return flights from Seattle to Seoul in December.

Skyscanner

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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