AirHint found the following cheapest return flights from San Francisco (SFO) to Seoul (GMP) in August 2025 (see full year).

Return flights

04 Aug - 22 Aug	China Eastern
26 Aug - 03 Sep	Japan Airlines
31 Aug - 08 Sep	Japan Airlines
31 Aug - 07 Sep	Japan Airlines
29 Aug - 07 Sep	Japan Airlines
27 Aug - 03 Sep	Japan Airlines
30 Aug - 03 Sep	Japan Airlines
31 Aug - 19 Sep	Japan Airlines
29 Aug - 06 Sep	Japan Airlines
21 Aug - 31 Aug	China Eastern
20 Aug - 27 Aug	ANA
10 Aug - 30 Aug	ANA
04 Aug - 26 Aug	ANA
14 Aug - 05 Sep	ANA
10 Aug - 20 Sep	ANA
14 Aug - 24 Aug	ANA
11 Aug - 19 Aug	ANA
12 Aug - 29 Aug	ANA
17 Aug - 21 Aug	ANA
14 Aug - 18 Aug	ANA

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 $728

Return flights