Cheapest return flights from Seattle to Seoul in December from $1068

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

07 Dec - 30 Dec Air Canada
13 Dec - 31 Dec Air Canada
31 Dec - 07 Jan Air Canada
13 Dec - 31 Dec Korean Air direct
21 Dec - 31 Dec Air Canada
07 Dec - 30 Dec Asiana Airlines direct
31 Dec - 07 Jan Delta direct
21 Dec - 31 Dec Asiana Airlines direct
21 Dec - 04 Jan Asiana Airlines
20 Dec - 03 Jan Asiana Airlines
21 Dec - 02 Jan Finnair
21 Dec - 02 Jan Asiana Airlines direct
21 Dec - 04 Jan Korean Air direct
20 Dec - 03 Jan Asiana Airlines 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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