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

Return flights

14 Jun - 30 Jun	Allegiant Air
13 Jun - 30 Jun	Allegiant Air
16 Jun - 20 Jun	Alaska Airlines
01 Jun - 15 Jun	Sun Country Airlines
22 Jun - 08 Jul	TAP
20 Jun - 12 Jul	Alaska Airlines
22 Jun - 07 Jul	TAP
12 Jun - 27 Jun	Sun Country Airlines
21 Jun - 30 Jun	Lufthansa
19 Jun - 01 Jul	Alaska Airlines
19 Jun - 11 Jul	Sun Country Airlines
01 Jun - 15 Jun	Delta	direct
22 Jun - 07 Jul	Delta	direct
22 Jun - 08 Jul	Delta	direct
13 Jun - 30 Jun	Delta	direct
21 Jun - 30 Jun	Delta	direct
19 Jun - 01 Jul	Delta	direct
12 Jun - 27 Jun	Delta	direct
19 Jun - 11 Jul	Delta	direct
20 Jun - 12 Jul	Delta	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 988€

Return flights