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

Return flights

04 Jun - 23 Jun	Alaska Airlines
14 Jun - 30 Jun	Alaska Airlines
01 Jun - 21 Jun	WestJet
10 Jun - 14 Jun	Alaska Airlines
10 Jun - 01 Jul	Lufthansa
10 Jun - 13 Jul	Lufthansa
01 Jun - 30 Jun	Lufthansa
20 Jun - 29 Jun	Allegiant Air
18 Jun - 30 Jun	Lufthansa
20 Jun - 25 Jul	Allegiant Air
24 Jun - 10 Jul	Etihad Airways
17 Jun - 14 Jul	Lufthansa
24 Jun - 10 Jul	Air Premia	direct
10 Jun - 01 Jul	Air Premia	direct
10 Jun - 13 Jul	Air Premia	direct
01 Jun - 21 Jun	Air Premia	direct
10 Jun - 14 Jun	Air Premia	direct
04 Jun - 23 Jun	Delta	direct
17 Jun - 14 Jul	Delta	direct
20 Jun - 25 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.

Book a cheap hotel in Seoul

Cheap car rent in Seoul

Cheapest return flights from Washington to Seoul in June from 1140€

Return flights