Cheapest one-way flights from Seattle to Seoul in December from $430

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

One-Way flights

10 Dec Alaska Airlines direct
04 Dec Hawaiian Airlines direct
06 Dec Korean Air
06 Dec Korean Air direct
26 Dec Hawaiian Airlines direct
28 Dec Hawaiian Airlines direct
31 Dec Asiana Airlines direct
30 Dec Asiana Airlines direct
27 Dec Hawaiian Airlines direct
24 Dec Korean Air

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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