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

One-Way flights

30 Aug	Scoot Tigerair
31 Aug	Scoot Tigerair
29 Aug	Zipair
20 Aug	Scoot Tigerair
22 Aug	Scoot Tigerair
21 Aug	Scoot Tigerair
23 Aug	Scoot Tigerair
28 Aug	China Airlines
19 Aug	China Airlines
24 Aug	China Airlines

Also check the deals for return flights from Singapore to San Francisco 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 one-way flights from Singapore to San Francisco in August from $448

One-Way flights