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

One-Way flights

02 Dec	China Airlines
19 Dec	China Airlines
11 Dec	China Airlines
04 Dec	China Airlines
13 Dec	China Airlines
02 Dec	United	direct
19 Dec	United	direct
11 Dec	United	direct
13 Dec	United	direct
04 Dec	United	direct

Also check the deals for return flights from Singapore to San Francisco in December.

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 December from $481

One-Way flights