AirHint found the following cheapest one-way flights from Singapore (SIN) to San Francisco (SFO) in April 2026 (see full year).
One-Way flights
| 18 Apr | Cebu Pacific | ||
| 01 Apr | China Airlines | ||
| 19 Apr | United | direct | |
| 01 Apr | United | direct | |
| 18 Apr | United | direct |
Also check the deals for return flights from Singapore to San Francisco in April.
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