Cheapest one-way IAD–ICN flights, May

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

One-Way flights

20 May Air Premia direct
15 May Air Premia direct
18 May Air Premia direct
13 May Air Premia direct
27 May Porter Airlines (Canada) Ltd
30 May Porter Airlines (Canada) Ltd
09 May Alaska Airlines
16 May WestJet
31 May Porter Airlines (Canada) Ltd
26 May Alaska 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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