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

Return flights

25 Aug - 31 Aug	Air Canada
31 Aug - 09 Sep	Air Canada
28 Aug - 30 Aug	Air Canada
28 Aug - 05 Sep	Air Canada
24 Aug - 28 Aug	Air Canada
24 Aug - 29 Aug	Air Canada
22 Aug - 28 Aug	Air Canada
24 Aug - 31 Aug	Air Canada
18 Aug - 25 Aug	Philippine Airlines
26 Aug - 31 Aug	Philippine Airlines
21 Aug - 30 Aug	Philippine Airlines
27 Aug - 30 Aug	Air Canada
21 Aug - 11 Sep	Air Canada
21 Aug - 11 Sep	Air Premia	direct
31 Aug - 09 Sep	Air Premia	direct
28 Aug - 05 Sep	Air Premia	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 539€

Return flights