Cheapest one-way flights from Washington to Seoul in December from $428

AirHint found the following cheapest one-way flights from Washington (IAD) to Seoul (ICN) in December 2025 (see full year).

One-Way flights

03 Dec Frontier Airlines
06 Dec Frontier Airlines
05 Dec Frontier Airlines
08 Dec Frontier Airlines
01 Dec Turkish Airlines
29 Dec Turkish Airlines
07 Dec Turkish Airlines
10 Dec Frontier Airlines
30 Dec Turkish Airlines
26 Dec Frontier Airlines

Also check the deals for return flights from Washington 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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