Cheapest return flights from Seattle to Seoul in December from $1132

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

06 Dec - 25 Jan Turkish Airlines
13 Dec - 31 Dec Alaska Airlines
06 Dec - 25 Jan Asiana Airlines direct
12 Dec - 11 Jan Alaska Airlines
13 Dec - 31 Dec Asiana Airlines direct
12 Dec - 11 Jan Hawaiian Airlines direct
20 Dec - 03 Jan Asiana Airlines
20 Dec - 03 Jan Asiana Airlines direct
25 Dec - 04 Jan Qatar Airways
25 Dec - 04 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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