Cheapest return flights from Seattle to Seoul in December from 942€

Best time to book flights for Seattle (SEA) to Seoul (ICN) flights at AirHint

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

Return flights

02 Dec - 07 Dec Alaska Airlines
02 Dec - 21 Dec Air Canada
07 Dec - 20 Dec Turkish Airlines
02 Dec - 07 Dec Asiana Airlines direct
02 Dec - 21 Dec Asiana Airlines direct
05 Dec - 02 Jan Air Canada
07 Dec - 20 Dec Asiana Airlines direct
20 Dec - 03 Jan Singapore Airlines
05 Dec - 02 Jan Korean Air direct
20 Dec - 03 Jan Korean Air direct

Also check the deals for one-way 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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