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

Return flights

22 Aug - 30 Aug	China Airlines
26 Aug - 31 Aug	China Airlines
07 Aug - 16 Aug	Air Canada
08 Aug - 15 Aug	Air Canada
01 Aug - 08 Aug	Air Canada
01 Aug - 16 Aug	Air Canada
01 Aug - 09 Aug	Air Canada
03 Aug - 12 Aug	Air Canada
02 Aug - 09 Aug	Air Canada
26 Aug - 31 Aug	Korean Air	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 762€

Return flights