Cheapest return flights from Seattle to Seoul in December from 754€

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

Return flights

09 Dec - 24 Dec Delta direct
11 Dec - 30 Dec Delta
15 Dec - 18 Dec Air Canada
15 Dec - 18 Dec Asiana Airlines direct
11 Dec - 30 Dec Korean Air direct
15 Dec - 30 Dec Asiana Airlines direct
25 Dec - 01 Jan Air Canada
19 Dec - 09 Jan Delta direct
25 Dec - 01 Jan Korean Air direct
24 Dec - 04 Jan United
19 Dec - 10 Jan Air Canada
18 Dec - 12 Jan Delta direct
27 Dec - 03 Jan Turkish Airlines
15 Dec - 31 Dec Delta direct
19 Dec - 10 Jan Asiana Airlines direct
24 Dec - 04 Jan Delta direct
19 Dec - 03 Jan China Airlines

Also check the deals for one-way flights from Seattle to Seoul in December.

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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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