Cheapest return flights from San Francisco to Seoul in September from $638

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

Return flights

10 Sep - 17 Sep Air Premia direct
03 Sep - 24 Sep Air Premia direct
01 Sep - 22 Sep Air Premia direct
07 Sep - 22 Sep Air Premia direct
19 Sep - 21 Sep Air Premia direct
15 Sep - 22 Sep Air Premia direct
05 Sep - 12 Sep Air Premia direct
07 Sep - 14 Sep Air Premia direct
05 Sep - 21 Sep Air Premia direct
26 Sep - 12 Oct Air Premia direct
01 Sep - 21 Sep Air Premia direct
29 Sep - 13 Oct Air Premia direct
22 Sep - 29 Oct Air Premia direct
28 Sep - 12 Oct Air Premia direct
30 Sep - 22 Oct United direct
17 Sep - 14 Oct United direct
23 Sep - 31 Oct United direct
11 Sep - 01 Oct United direct
16 Sep - 08 Oct Flair Airlines
26 Sep - 05 Oct Air Premia direct

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