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

Return flights

16 May - 28 May	Air Canada
09 May - 19 May	Air Canada
10 May - 25 May	Air Canada
15 May - 25 May	Air Canada
11 May - 18 May	Air Canada
31 May - 07 Jun	Air Canada
18 May - 30 May	Air Canada
08 May - 25 May	Air Canada
01 May - 09 May	Air Canada
01 May - 11 May	Air Canada
29 May - 18 Jun	Air Canada
01 May - 10 May	Air Canada
14 May - 04 Jun	Air Canada
15 May - 05 Jun	Asiana Airlines
16 May - 02 Jun	jetBlue
27 May - 10 Jun	Finnair
13 May - 29 Jun	Emirates
10 May - 29 Jun	Emirates
11 May - 29 Jun	Emirates
12 May - 29 Jun	Emirates

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

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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Cheapest return flights from Washington to Seoul in May from $1041

Return flights