How reliable is Singapore Changi Airport?
Month-by-month weather risk and connection guidance for Singapore Changi 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 SIN yet
Our historical on-time and cancellation record currently covers the US, UK, Brazil, and Australia, so we don’t score departure reliability at Singapore Changi 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 Singapore
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 — thunderstorms, low visibility & fog · 97/100 favorability
Connecting through SIN
How much layover you really need
Allow at least this between domestic flights at SIN. Below it, one small delay risks a misconnect.
International transfers add immigration and bag recheck — give yourself this buffer at SIN or more.
PlaneSane connection-time estimate tuned for SIN's terminal layout. We score every connecting itinerary against conservative connection floors.
The read on SIN
What the numbers say about flying through Singapore Changi Airport
PlaneSane doesn't yet have on-time and cancellation history for Singapore Changi 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, Singapore is an unusually calm-weather airport year-round. February is the calmest stretch for flying, scoring 99 out of 100 for favorable conditions, while April is the most disruptive at 97, 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 SIN, give yourself room. A domestic connection wants at least about 60 minutes, and international transfer wants roughly 90 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 Singapore, 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 SIN
- What is the best month to fly from SIN for good weather?
- February has the calmest flying weather at Singapore Changi Airport. April is the most disruptive, mainly from thunderstorms and low visibility & fog.
- How much layover time do you need at SIN?
- Allow at least about 60 minutes for a domestic connection and about 90 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 Singapore?
Score real flights to and from SIN on reliability, weather, and connection safety — not just price.