Cheapest return flights from Washington to Seoul in May from $1076

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

Return flights

04 May - 27 May Turkish Airlines
03 May - 11 May Turkish Airlines
20 May - 18 Jun WestJet
22 May - 30 May WestJet
15 May - 06 Jun Air Canada
31 May - 27 Jun Air Canada
02 May - 16 May Air Canada
04 May - 27 May Delta direct
03 May - 11 May Korean Air direct
02 May - 16 May Delta direct
20 May - 18 Jun Korean Air direct
22 May - 30 May Delta direct
15 May - 06 Jun Delta direct
31 May - 27 Jun Korean Air direct

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

Skyscanner

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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