SQ391 IstanbulIST · 13:10 SingaporeSIN · 04:55
SQ391 by Singapore Airlines flies from Istanbul (IST) to Singapore (SIN).
scheduled from IST
The route today
live boardsWeather lens
Weather-conditioned outlook for this flight right now
Measured, 90-day sampleDriven mainly by SIN (Singapore), 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 Istanbul to Singapore flights today
same route · Singapore AirlinesIf SQ391 is cancelled, this is the other Singapore Airlines nonstop flight from Istanbul to Singapore on the same day, with scheduled departure times in IST local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How SQ391 actually runs
Pro Flight Search has tracked every published board update for SQ391 across the IST and SIN boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: left right on schedule but landed about 38 min early. Not enough to call it.
The verdict above is that record speaking, so it reflects how SQ391 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 IST and SIN published them.
Planning around SQ391? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — SQ391 Istanbul to Singapore on-time performance, measured from the IST and SIN airport boards.
https://proflightsearch.com/flight/SQ391
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