How reliable is Bandaranaike International Colombo Airport?
Month-by-month weather risk and connection guidance for Bandaranaike International Colombo 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 CMB yet
Our historical on-time and cancellation record currently covers the US, UK, Brazil, and Australia, so we don’t score departure reliability at Bandaranaike International Colombo Airport yet. Weather climatology and connection guidance below come from separate global/observed sources and still apply.
Weather by month
When the weather works for you at Colombo
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 · 100/100 favorability
Roughest month
Most disruptive — thunderstorms, low visibility & fog · 96/100 favorability
Connecting through CMB
How much layover you really need
Based on 79 sellable international itineraries seen through Google Flights. Median observed layover: 145 min.
Observed windows come from normalized SearchAPI / Google Flights itineraries. They are not official airport MCTs. We score every connecting itinerary against conservative connection floors.
The read on CMB
What the numbers say about flying through Bandaranaike International Colombo Airport
PlaneSane doesn't yet have on-time and cancellation history for Bandaranaike International Colombo 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, Colombo is an unusually calm-weather airport year-round. July is the calmest stretch for flying, scoring 100 out of 100 for favorable conditions, while April is the most disruptive at 96, driven mainly by thunderstorms and low visibility & fog. The year is relatively steady, so no single month stands out as one to avoid on weather alone.
If you're connecting through CMB, give yourself room. An international transfers around 45 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 Colombo, 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 CMB
- What is the best month to fly from CMB for good weather?
- July has the calmest flying weather at Bandaranaike International Colombo Airport. April is the most disruptive, mainly from thunderstorms and low visibility & fog.
- How much layover time do you need at CMB?
- Allow at least about 45 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.
Reliability guides
Planning a trip through Colombo?
Score real flights to and from CMB on reliability, weather, and connection safety — not just price.