Cheapest return flights from San Francisco to Seoul in September from $617

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

Return flights

16 Sep - 08 Oct Flair Airlines
17 Sep - 14 Oct Air China
05 Sep - 14 Sep Air Premia direct
24 Sep - 29 Oct Air Premia direct
10 Sep - 17 Sep Air Premia direct
07 Sep - 24 Sep Air Premia direct
17 Sep - 29 Sep Air Premia direct
10 Sep - 24 Sep Air Premia direct
08 Sep - 19 Sep Air Premia direct
17 Sep - 22 Sep Air Premia direct
07 Sep - 22 Sep Air Premia direct
08 Sep - 14 Sep Air Premia direct
07 Sep - 14 Sep Air Premia direct
24 Sep - 15 Oct Air Premia direct
29 Sep - 08 Oct Air Premia direct
28 Sep - 19 Oct Air Premia direct
26 Sep - 05 Oct United direct
17 Sep - 14 Oct United direct
16 Sep - 08 Oct United direct
30 Sep - 07 Oct United direct

Also check the deals for one-way flights from San Francisco to Seoul in September.

Skyscanner

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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