Flights SQ391 13:10 Mo We Fr Sa Su
Direct flights from Istanbul (IST) to Singapore (SIN): 12 nonstop departures observed each week across 2 airlines. The median arrival is 25 minutes late. No cancellations were recorded across the 4 tracked flights. The nonstop covers 8,680 km, an estimated 11 hours 38 minutes in the air. Measured by Pro Flight Search from live flight boards at Istanbul and Singapore. Updated 7 September 2026 at 03:32 UTC.
route health from live IST and SIN delay boards
Median arrival delay is +25 min. 0 of 4 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
The week
scheduled departures · origin local timeEach mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysHistory
operated legs · board outcomesActual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsWeather lens
Current conditions put the pressure at IST and SIN: 21% odds of a 15+ minute delay and around +-5 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →
next sweep in 120s
How the Istanbul to Singapore route actually runs
Pro Flight Search records official board updates for nonstop IST to SIN flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · 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 — Istanbul (IST) to Singapore (SIN) route reliability, measured from operated flights on official airport boards.
https://proflightsearch.com/search-flights/IST-SIN
IST to SIN questions
Is IST–SIN running on time right now?
Smooth skies ahead. The departure side at IST is the weaker end, route health score 94/100. The airports section above carries the live status and delay window at both ends.
Morning or evening flight on IST–SIN?
Operators schedule morning departures around 01:55 and evening departures around 19:20 from IST. Earlier flights typically land before destination-airport delays accumulate later in the day; check the SIN delay card to confirm conditions when you'd arrive.
How long is the flight from IST to SIN?
Great-circle distance is 8,680 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 643–774 min gate-to-gate on this route.
How often does IST–SIN fly?
2 carriers operate this route, around 23 flights a week between them. Compare carrier days and times in the airline list above.