Cheapest one-way flights from Washington to Seoul in January from $523

AirHint found the following cheapest one-way flights from Washington (IAD) to Seoul (ICN) in January 2026 (see full year).

One-Way flights

26 Jan Turkish Airlines
21 Jan Turkish Airlines
03 Jan Frontier Airlines
31 Jan Turkish Airlines
02 Jan Frontier Airlines
21 Jan Delta direct
26 Jan Delta direct
17 Jan United
31 Jan Korean Air direct
17 Jan Delta direct

Also check the deals for return flights from Washington to Seoul in January.

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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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