How reliable is Francisco de Sá Carneiro Airport?
Month-by-month weather risk and connection guidance for Francisco de Sá Carneiro 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 OPO yet
Our historical on-time and cancellation record currently covers the US, UK, Brazil, and Australia, so we don’t score departure reliability at Francisco de Sá Carneiro 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 Porto
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 · 96/100 favorability
Roughest month
Most disruptive — low visibility & fog, high winds · 87/100 favorability
Connecting through OPO
How much layover you really need
Based on 37 sellable international itineraries seen through Google Flights. Median observed layover: 140 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 OPO
What the numbers say about flying through Francisco de Sá Carneiro Airport
PlaneSane doesn't yet have on-time and cancellation history for Francisco de Sá Carneiro 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, Porto is an unusually calm-weather airport year-round. April is the calmest stretch for flying, scoring 96 out of 100 for favorable conditions, while August is the most disruptive at 87, driven mainly by low visibility & fog and high winds. The year is relatively steady, so no single month stands out as one to avoid on weather alone.
If you're connecting through OPO, give yourself room. An international transfers around 81 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 Porto, read how we weigh it all in how the Peace of Mind Score works, and brush up with how to pick a reliable flight and avoiding weather delays.
Common questions about OPO
- What is the best month to fly from OPO for good weather?
- April has the calmest flying weather at Francisco de Sá Carneiro Airport. August is the most disruptive, mainly from low visibility & fog and high winds.
- How much layover time do you need at OPO?
- Allow at least about 81 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.
Peace of Mind
Where to stay in Porto
Hotels scored on cleanliness, location, price fairness, and trust — not just stars.
Reliability guides
Planning a trip through Porto?
Score real flights to and from OPO on reliability, weather, and connection safety — not just price.
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