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

Return flights

05 Jul - 18 Jul	ANA
06 Jul - 12 Jul	Cathay Pacific
20 Jul - 09 Aug	Alaska Airlines
19 Jul - 31 Jul	Air Canada
02 Jul - 09 Jul	ANA
10 Jul - 22 Aug	Alaska Airlines
06 Jul - 12 Jul	Asiana Airlines	direct
24 Jul - 02 Aug	Air Canada
20 Jul - 09 Aug	Delta	direct
05 Jul - 18 Jul	Delta	direct
10 Jul - 22 Aug	Delta	direct
24 Jul - 02 Aug	Delta	direct
02 Jul - 09 Jul	Delta	direct

Also check the deals for one-way flights from Seattle 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 Seattle to Seoul in July from 884€

Return flights