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

Return flights

14 Aug - 21 Aug	Asiana Airlines
29 Aug - 08 Sep	Air India
29 Aug - 09 Sep	Air India
21 Aug - 26 Aug	Asiana Airlines
24 Aug - 02 Sep	Asiana Airlines
26 Aug - 01 Sep	Asiana Airlines
17 Aug - 24 Aug	Asiana Airlines
12 Aug - 20 Aug	Asiana Airlines
21 Aug - 30 Aug	Asiana Airlines
06 Aug - 28 Aug	Asiana Airlines
21 Aug - 02 Sep	Asiana Airlines
07 Aug - 21 Aug	Asiana Airlines
06 Aug - 13 Aug	Korean Air
11 Aug - 18 Aug	Korean Air
12 Aug - 22 Aug	Asiana Airlines
29 Aug - 05 Sep	Air India
21 Aug - 03 Sep	Korean Air
22 Aug - 01 Sep	Korean Air
24 Aug - 02 Sep	United	direct
29 Aug - 08 Sep	United	direct

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

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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Cheapest return flights from San Francisco to Singapore in August from 556€

Return flights