Cheapest return flights from Washington to Seoul in May from $1045

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

Return flights

06 May - 28 May Turkish Airlines
11 May - 22 May Turkish Airlines
07 May - 18 May Turkish Airlines
13 May - 27 May Turkish Airlines
09 May - 16 May Turkish Airlines
08 May - 23 May Etihad Airways
08 May - 18 May Turkish Airlines
27 May - 06 Jun Porter Airlines (Canada) Ltd
21 May - 31 May Air Canada
06 May - 28 May Delta direct
07 May - 18 May Delta direct
27 May - 06 Jun Delta direct

Also check the deals for one-way flights from Washington to Seoul in May.

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