✈ SFO → SIN
16H 55M, 8,438 MILES. YOUR ANCESTORS WALKED LESS THAN THIS.
Flight from San Francisco to Singapore
From SFO (SFO), USA North America → Changi (SIN), Singapore Asia
How long is the flight from San Francisco to Singapore?
A nonstop flight from San Francisco (SFO) to Singapore (SIN) takes about 16 hours 55 minutes, covering a great-circle distance of 8,438 miles (13,580 km). Actual scheduled time varies by airline, routing, and wind — expect ±15 to 30 minutes from this estimate.
Avg flight time
16h 55m
Nonstop, scheduled
Distance
8,438 mi
13,580 km · great-circle
Avg speed
803 km/h
Door-to-door including taxi
Time zones & jet lag
San Francisco timezone
UTC-7
America/Los_Angeles
Singapore timezone
UTC+8
Asia/Singapore
Time difference
+15h
15 hours ahead
Jet lag (rough)
~15d
Eastward — worse
CO₂ footprint per passenger
Economy class, single passenger. Source: DEFRA 2024 averages.
This flight emits roughly 3.6× the CO₂ of an equivalent train trip and 0.9× a car driven alone over the same distance.