Cheapest one-way flights from Washington to Seoul in April from $430

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

One-Way flights

14 Apr Air China
10 Apr Air China
29 Apr Frontier Airlines
07 Apr Air China
24 Apr Air China
04 Apr Frontier Airlines
05 Apr Frontier Airlines
28 Apr Frontier Airlines
16 Apr Porter Airlines (Canada) Ltd
20 Apr Hawaiian Airlines

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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