How reliable is Leoš Janáček Airport Ostrava?
Month-by-month weather risk and connection guidance for Leoš Janáček Airport Ostrava. 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 OSR yet
Our historical on-time and cancellation record currently covers the US, UK, Brazil, and Australia, so we don’t score departure reliability at Leoš Janáček Airport Ostrava 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 Mošnov
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 · 97/100 favorability
Roughest month
Most disruptive — low visibility & fog, snow · 76/100 favorability
The read on OSR
What the numbers say about flying through Leoš Janáček Airport Ostrava
PlaneSane doesn't yet have on-time and cancellation history for Leoš Janáček Airport Ostrava, 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, Mošnov is an unusually calm-weather airport year-round. May is the calmest stretch for flying, scoring 97 out of 100 for favorable conditions, while December is the most disruptive at 76, driven mainly by low visibility & fog and snow. The seasonal swing is real but manageable; favor the calmer months when your dates are flexible.
None of this guarantees your specific flight — it’s the backdrop. To turn it into a booking, score real flights to Mošnov, 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 OSR
- What is the best month to fly from OSR for good weather?
- May has the calmest flying weather at Leoš Janáček Airport Ostrava. December is the most disruptive, mainly from low visibility & fog and snow.
Planning a trip through Mošnov?
Score real flights to and from OSR on reliability, weather, and connection safety — not just price.