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

Return flights

15 Jul - 04 Aug	Alaska Airlines
31 Jul - 14 Aug	Air Premia	direct
01 Jul - 31 Jul	Alaska Airlines
08 Jul - 15 Jul	Alaska Airlines
03 Jul - 26 Jul	Alaska Airlines
18 Jul - 08 Aug	Lufthansa
02 Jul - 14 Aug	Air Canada
01 Jul - 14 Aug	Air Canada
01 Jul - 15 Aug	Air Canada
15 Jul - 05 Aug	Air Premia	direct
03 Jul - 26 Jul	Air Premia	direct
01 Jul - 12 Aug	Air Canada
01 Jul - 31 Jul	Air Premia	direct
01 Jul - 14 Aug	Air Premia	direct
08 Jul - 15 Jul	Air Premia	direct
15 Jul - 04 Aug	Delta	direct
17 Jul - 18 Jul	Korean Air

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

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 July from 1180€

Return flights