Cheapest return flights from Seattle (SEA) to Seoul (GMP), December

20 dates in December, from $ 1,172. Book in one tap, or check whether to buy now or wait.

One-wayReturn
Dates, airline, and price
Dates Airline Price
3 Dec 13 Dec Cathay Pacific
2 Dec 9 Dec China Airlines
3 Dec 17 Dec Japan Airlines
4 Dec 16 Dec Japan Airlines
1 Dec 17 Dec Japan Airlines
7 Dec 11 Dec EVA Air
15 Dec 22 Dec Japan Airlines
30 Dec 6 Jan 2027 Cathay Pacific
10 Dec 14 Dec Japan Airlines
16 Dec 21 Dec Air Canada
13 Dec 22 Dec Japan Airlines
25 Dec 12 Jan 2027 Japan Airlines
23 Dec 10 Jan 2027 Japan Airlines
29 Dec 5 Jan 2027 Alaska Airlines
21 Dec 11 Jan 2027 Japan Airlines
19 Dec 5 Jan 2027 Alaska Airlines
11 Dec 2 Jan 2027 EVA Air
23 Dec 3 Jan 2027 Japan Airlines
28 Dec 10 Jan 2027 China Eastern
21 Dec 3 Jan 2027 ANA
Powered by

Cheapest deals for the full year

Deals for one-way flights from Seattle to Seoul in December.

Book a cheap hotel in Seoul

Cheap car rent in Gimpo

Updated Nov 15, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

Feel free to contact us with any feedback or request another flight research.