How reliable is Osmany International Airport?
Month-by-month weather risk and connection guidance for Osmany International 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 ZYL yet
Our historical on-time and cancellation record currently covers the US, UK, Brazil, and Australia, so we don’t score departure reliability at Osmany International Airport yet. Weather climatology below comes from global airport observations and still applies.
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Weather by month
When the weather works for you at Sylhet
A calm-weather score (0–100) for each month from decades of airport observations — how often conditions disrupt flying, not temperature. Higher is calmer.
Weather history is not available for all months yet; this chart shows the 3 months currently covered.
Calmest month
Calmest flying weather of the year · 100/100 favorability
Roughest month
Most disruptive — low visibility & fog · 45/100 favorability
The read on ZYL
What the numbers say about flying through Osmany International Airport
PlaneSane doesn't yet have on-time and cancellation history for Osmany International 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, Sylhet is a mixed-weather airport where the season matters a great deal. July is the calmest stretch for flying, scoring 100 out of 100 for favorable conditions, while October is the most disruptive at 45, driven mainly by low visibility & fog. That's a dramatic seasonal swing — the difference between flying here in its best and worst months is large enough to move your delay odds meaningfully, so timing matters more here than at most airports.
None of this guarantees your specific flight — it’s the backdrop. To turn it into a booking, score real flights to Sylhet, 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 ZYL
- What is the best month to fly from ZYL for good weather?
- July has the calmest flying weather at Osmany International Airport. October is the most disruptive, mainly from low visibility & fog.
Planning a trip through Sylhet?
Score real flights to and from ZYL on reliability, weather, and connection safety — not just price.