Cheapest return flights from Singapore to San Francisco in December from $670

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

Return flights

15 Dec - 29 Dec Cathay Pacific
11 Dec - 09 Jan Cathay Pacific
22 Dec - 06 Jan Cathay Pacific
22 Dec - 03 Jan Cathay Pacific
25 Dec - 31 Dec Cathay Pacific
10 Dec - 31 Dec Cathay Pacific
23 Dec - 04 Jan Cathay Pacific
16 Dec - 03 Jan Cathay Pacific
16 Dec - 05 Jan Cathay Pacific
26 Dec - 09 Jan Cathay Pacific
27 Dec - 09 Jan Cathay Pacific
24 Dec - 08 Jan Cathay Pacific
25 Dec - 08 Jan Cathay Pacific
05 Dec - 08 Dec China Airlines
19 Dec - 30 Dec China Airlines
05 Dec - 08 Dec United direct
25 Dec - 31 Dec United direct
19 Dec - 30 Dec United direct
10 Dec - 31 Dec United direct
09 Dec - 13 Dec China Airlines

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

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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