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

Return flights

30 Aug - 17 Sep	Philippine Airlines
24 Aug - 29 Aug	Philippine Airlines
24 Aug - 28 Aug	Philippine Airlines
25 Aug - 29 Aug	Philippine Airlines
27 Aug - 10 Sep	China Airlines
22 Aug - 26 Aug	China Airlines
13 Aug - 24 Aug	Air Canada
06 Aug - 13 Aug	Air Canada
21 Aug - 29 Aug	Air Canada
11 Aug - 17 Aug	Air Canada
30 Aug - 11 Sep	Air Premia	direct
12 Aug - 16 Aug	Air Canada
22 Aug - 26 Aug	Air Premia	direct
27 Aug - 10 Sep	Asiana Airlines	direct
30 Aug - 17 Sep	Asiana Airlines	direct

Also check the deals for one-way flights from Seoul to San Francisco 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 San Francisco in August from 655€

Return flights