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

Return flights

02 Dec - 12 Dec	Korean Air
01 Dec - 15 Dec	United	direct
01 Dec - 19 Dec	Asiana Airlines
02 Dec - 12 Dec	United	direct
01 Dec - 19 Dec	United	direct
05 Dec - 08 Dec	Korean Air
09 Dec - 30 Dec	Hawaiian Airlines
05 Dec - 08 Dec	Singapore Airlines	direct
08 Dec - 12 Jan	Delta
10 Dec - 09 Jan	Air Premia
15 Dec - 24 Dec	United	direct
15 Dec - 31 Dec	Air Premia
23 Dec - 01 Jan	Korean Air
15 Dec - 01 Jan	Air Premia
10 Dec - 09 Jan	United	direct
15 Dec - 03 Jan	Air Premia
22 Dec - 07 Jan	Delta
15 Dec - 01 Jan	United	direct
23 Dec - 01 Jan	United	direct
16 Dec - 02 Jan	United	direct

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

Book a cheap hotel in Singapore

Cheap car rent in Singapore

Cheapest return flights from San Francisco to Singapore in December from 562€

Return flights