Cheapest one-way flights from Seattle to Seoul in December from $576

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

One-Way flights

13 Dec Air Canada
22 Dec Asiana Airlines direct
13 Dec Asiana Airlines direct
21 Dec Air Canada
20 Dec Air Canada
21 Dec Asiana Airlines direct
20 Dec Asiana Airlines direct

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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