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

Return flights

24 Dec - 07 Jan	Singapore Airlines	direct
04 Dec - 07 Dec	Air Canada
24 Dec - 09 Jan	Singapore Airlines	direct
22 Dec - 08 Jan	Singapore Airlines	direct
19 Dec - 01 Jan	China Airlines
16 Dec - 30 Dec	China Airlines
24 Dec - 31 Dec	China Airlines
18 Dec - 31 Dec	China Airlines
22 Dec - 31 Dec	China Airlines
14 Dec - 28 Dec	China Airlines
13 Dec - 03 Jan	China Airlines
20 Dec - 03 Jan	China Airlines
05 Dec - 15 Dec	STARLUX Airlines
29 Dec - 29 Dec	China Airlines
13 Dec - 23 Dec	China Airlines
24 Dec - 31 Dec	United	direct
08 Dec - 21 Jan	Delta
08 Dec - 04 Jan	Delta
22 Dec - 05 Jan	Delta
19 Dec - 03 Jan	Delta

Also check the deals for one-way 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 return flights from Singapore to San Francisco in December from $746

Return flights