Cheapest one-way flights from Washington to Seoul in April from $426

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

One-Way flights

24 Apr Air China
17 Apr Air China
23 Apr Alaska Airlines
08 Apr EVA Air
18 Apr Etihad Airways
16 Apr Turkish Airlines
30 Apr ANA
25 Apr ANA

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

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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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