SQ31 San FranciscoSFO · 11:45 SingaporeSIN · 19:10
SQ31 by Singapore Airlines flies from San Francisco (SFO) to Singapore (SIN) for the Fri, Sep 11 departure.
departs SFO · on schedule
board checked 7m ago · checking again in 45s
Where the minutes go
last 3 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The route today
live boardsWeather lens
Weather-conditioned outlook for this flight right now
Measured, 90-day sampleDriven mainly by SFO (San Francisco), currently flying MVFR (marginal visual). For this route and airline, under conditions like today's, over the last 90 days.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other San Francisco to Singapore flights today
same route · Singapore AirlinesIf SQ31 is cancelled, this is the other Singapore Airlines nonstop flight from San Francisco to Singapore on the same day, with scheduled departure times in SFO local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How SQ31 actually runs
Pro Flight Search has tracked every published board update for SQ31 across the SFO and SIN boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 3 completed legs so far: left a little late (~18 min) but landed about 21 min early. Not enough to call it.
The verdict above is that record speaking, so it reflects how SQ31 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationBoard clocks recorded as SFO and SIN published them.
Planning around SQ31? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search — SQ31 San Francisco to Singapore on-time performance, measured from the SFO and SIN airport boards.
https://proflightsearch.com/flight/SQ31
.