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

Return flights

02 Jun - 09 Jun	Alaska Airlines
05 Jun - 20 Jul	WestJet
20 Jun - 29 Jun	Lufthansa
21 Jun - 18 Jul	Lufthansa
06 Jun - 14 Jun	Alaska Airlines
22 Jun - 08 Jul	WestJet
30 Jun - 15 Jul	Lufthansa
19 Jun - 08 Jul	SWISS
02 Jun - 16 Jun	Alaska Airlines
16 Jun - 30 Jun	Alaska Airlines
08 Jun - 12 Jun	WestJet
19 Jun - 17 Jul	SWISS
22 Jun - 20 Jul	Lufthansa
10 Jun - 24 Jun	Alaska Airlines
13 Jun - 30 Jun	Alaska Airlines
11 Jun - 21 Jun	Alaska Airlines
24 Jun - 05 Jul	SWISS
12 Jun - 27 Jun	Sun Country Airlines
30 Jun - 07 Jul	Lufthansa
19 Jun - 26 Jul	SWISS

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 1087€

Return flights