Cheapest return flights from San Francisco to Seoul in September from $639

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

Return flights

17 Sep - 24 Sep Air Premia direct
21 Sep - 19 Oct Air Premia direct
29 Sep - 13 Oct Air Premia direct
27 Sep - 18 Oct Hawaiian Airlines
22 Sep - 27 Oct Air Premia direct
20 Sep - 18 Oct Alaska Airlines
24 Sep - 15 Oct Air Premia direct
23 Sep - 31 Oct Alaska Airlines
16 Sep - 20 Sep United direct
25 Sep - 24 Oct Hawaiian Airlines
17 Sep - 10 Oct United direct
21 Sep - 26 Sep United direct
17 Sep - 14 Oct United direct
19 Sep - 24 Sep Air Premia direct
19 Sep - 28 Sep Air Premia direct
22 Sep - 29 Sep Air Premia direct
22 Sep - 30 Sep United direct
21 Sep - 29 Sep United direct
21 Sep - 27 Sep Air Premia
19 Sep - 25 Sep Air Premia

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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