Cheapest return flights from Seoul to San Francisco in September from $358

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

Return flights

08 Sep - 15 Sep Air Premia direct
10 Sep - 15 Sep Air Premia direct
01 Sep - 08 Sep Air Premia direct
12 Sep - 15 Sep Air Premia direct
05 Sep - 15 Sep Air Premia direct
07 Sep - 15 Sep Air Premia direct
05 Sep - 08 Sep Air Premia direct
03 Sep - 31 Oct Air Premia direct
15 Sep - 19 Sep Air Premia direct
07 Sep - 14 Sep Air Premia direct
21 Sep - 26 Sep Air Premia direct
29 Sep - 05 Oct Air Premia direct
22 Sep - 01 Oct Air Premia direct
24 Sep - 05 Oct Air Premia direct
28 Sep - 06 Oct Air Premia direct
29 Sep - 19 Oct Air Premia direct
29 Sep - 03 Oct Air Premia direct
28 Sep - 05 Oct Air Premia direct
28 Sep - 26 Oct United direct
26 Sep - 19 Oct United direct

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

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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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