How reliable is İstanbul Airport?
Month-by-month weather risk and connection guidance for İstanbul Airport. We don’t yet have on-time performance history here — see why below.
Weather favorability
year-round climate
On-time performance data isn’t available for IST yet
Our historical on-time and cancellation record currently covers the US, UK, Brazil, and Australia, so we don’t score departure reliability at İstanbul Airport yet. Weather climatology and connection guidance below come from separate global/observed sources and still apply.
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Weather by month
When the weather works for you at Istanbul
A calm-weather score (0–100) for each month from decades of airport observations — how often conditions disrupt flying, not temperature. Higher is calmer.
Calmest month
Calmest flying weather of the year · 99/100 favorability
Roughest month
Most disruptive — low visibility & fog, snow · 90/100 favorability
Connecting through IST
How much layover you really need
Allow at least this between domestic flights at IST. Below it, one small delay risks a misconnect.
International transfers add immigration and bag recheck — give yourself this buffer at IST or more.
PlaneSane connection-time estimate tuned for IST's terminal layout. We score every connecting itinerary against conservative connection floors.
The read on IST
What the numbers say about flying through İstanbul Airport
PlaneSane doesn't yet have on-time and cancellation history for İstanbul Airport, so it isn't scored for departure reliability here — that record currently covers the US, UK, Brazil, and Australia. The weather and connection context below comes from separate global sources and still applies.
On weather, Istanbul is an unusually calm-weather airport year-round. July is the calmest stretch for flying, scoring 99 out of 100 for favorable conditions, while February is the most disruptive at 90, driven mainly by low visibility & fog and snow. The year is relatively steady, so no single month stands out as one to avoid on weather alone.
If you're connecting through IST, give yourself room. A domestic connection wants at least about 60 minutes, and international transfer wants roughly 75 minutes once immigration and a bag recheck are in the mix. Those are floors, not comfortable buffers — one inbound delay can erase them, so add margin when the connection matters.
None of this guarantees your specific flight — it’s the backdrop. To turn it into a booking, score real flights to Istanbul, read how we weigh it all in how the PlaneSane Score works, and brush up with how to pick a reliable flight and avoiding weather delays.
Common questions about IST
- What is the best month to fly from IST for good weather?
- July has the calmest flying weather at İstanbul Airport. February is the most disruptive, mainly from low visibility & fog and snow.
- How much layover time do you need at IST?
- Allow at least about 60 minutes for a domestic connection and about 75 minutes for an international one as a floor. These are minimums, not comfortable buffers — a single inbound delay can wipe them out, so add margin when you can.
Planning a trip through Istanbul?
Score real flights to and from IST on reliability, weather, and connection safety — not just price.