AirHint found the following cheapest return flights from Seoul (ICN) to Seattle (SEA) in August 2026 (see full year).

Return flights

28 Aug - 04 Sep	United
27 Aug - 29 Aug	United
29 Aug - 05 Sep	United
23 Aug - 13 Sep	China Airlines
24 Aug - 11 Sep	China Airlines
24 Aug - 29 Aug	United
01 Aug - 09 Aug	China Airlines
09 Aug - 30 Aug	China Airlines
03 Aug - 14 Aug	China Airlines
21 Aug - 29 Aug	Singapore Airlines
15 Aug - 22 Aug	Singapore Airlines
15 Aug - 30 Aug	Singapore Airlines
06 Aug - 14 Aug	Singapore Airlines
14 Aug - 18 Aug	Singapore Airlines
23 Aug - 13 Sep	Korean Air	direct
24 Aug - 11 Sep	Asiana Airlines	direct

Also check the deals for one-way flights from Seoul to Seattle in August.

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 Seoul to Seattle in August from $807

Return flights