Cheapest one-way flights from Seattle to Seoul in December from 333€

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

One-Way flights

04 Dec Hainan Airlines
09 Dec Alaska Airlines
06 Dec Alaska Airlines
02 Dec Alaska Airlines
09 Dec Asiana Airlines direct
29 Dec Asiana Airlines direct
02 Dec Asiana Airlines direct
31 Dec Asiana Airlines direct
08 Dec Asiana Airlines direct
04 Dec Korean Air direct

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

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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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