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

Return flights

15 Jun - 02 Jul	Air Canada
11 Jun - 25 Jun	Air Canada
08 Jun - 31 Jul	Air Canada
22 Jun - 29 Jun	Air Canada
08 Jun - 17 Jul	Air Canada
18 Jun - 28 Jul	Air Canada
17 Jun - 22 Jul	Air Canada
20 Jun - 29 Jun	Air France
11 Jun - 25 Jun	Delta	direct
15 Jun - 02 Jul	Delta	direct
22 Jun - 29 Jun	Delta	direct
17 Jun - 22 Jul	Korean Air	direct
18 Jun - 28 Jul	Korean Air	direct
08 Jun - 31 Jul	Korean Air	direct
20 Jun - 29 Jun	Delta	direct
08 Jun - 17 Jul	Korean Air	direct

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

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 June from 1217€

Return flights