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

Return flights

11 Aug - 31 Aug	Philippine Airlines
11 Aug - 17 Aug	Philippine Airlines
21 Aug - 03 Sep	Philippine Airlines
02 Aug - 16 Aug	Philippine Airlines
02 Aug - 07 Aug	Vietnam Airlines
02 Aug - 12 Aug	Vietnam Airlines
01 Aug - 14 Aug	Vietnam Airlines
11 Aug - 31 Aug	Asiana Airlines	direct
11 Aug - 17 Aug	Asiana Airlines	direct
21 Aug - 03 Sep	Asiana Airlines	direct
01 Aug - 14 Aug	United	direct
02 Aug - 16 Aug	United	direct

Also check the deals for one-way flights from San Francisco to Seoul 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 San Francisco to Seoul in August from $631

Return flights