Cheapest one-way flights from Washington to Seoul in May from $489

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

One-Way flights

02 May Frontier Airlines
10 May Etihad Airways
04 May Frontier Airlines
18 May WestJet
08 May Etihad Airways
01 May Frontier Airlines
16 May Frontier Airlines
25 May Porter Airlines (Canada) Ltd
17 May Icelandair
05 May China Airlines

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

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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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