Cheapest return flights from San Francisco to Singapore in September from $644

Best time to book flights for San Francisco (SFO) to Singapore (SIN) flights at AirHint

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

Return flights

14 Sep - 23 Sep Asiana Airlines
02 Sep - 23 Sep Asiana Airlines
02 Sep - 09 Sep Asiana Airlines
08 Sep - 15 Sep Asiana Airlines
10 Sep - 17 Sep Asiana Airlines
09 Sep - 16 Sep Asiana Airlines
10 Sep - 18 Sep Asiana Airlines
02 Sep - 23 Sep Singapore Airlines direct
02 Sep - 09 Sep Singapore Airlines direct
10 Sep - 17 Sep Singapore Airlines direct
27 Sep - 05 Oct Air India
27 Sep - 30 Oct Philippine Airlines
27 Sep - 17 Oct Asiana Airlines
27 Sep - 05 Oct United direct
27 Sep - 30 Oct United direct
27 Sep - 17 Oct United direct

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