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

Return flights

24 Jul - 19 Aug	Air Canada
06 Jul - 13 Jul	Alaska Airlines
05 Jul - 17 Jul	SWISS
01 Jul - 12 Jul	Air Canada
01 Jul - 05 Jul	Air Canada
06 Jul - 17 Jul	Alaska Airlines
31 Jul - 15 Aug	Alaska Airlines
06 Jul - 17 Jul	Air Premia	direct
08 Jul - 22 Jul	Alaska Airlines
08 Jul - 22 Jul	Air Premia	direct
07 Jul - 17 Jul	Lufthansa
06 Jul - 13 Jul	Air Premia	direct
24 Jul - 19 Aug	Air Premia	direct
31 Jul - 15 Aug	Korean Air	direct

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 $1327

Return flights