How reliable is Keflavik International Airport?
Month-by-month weather risk and connection guidance for Keflavik 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 KEF yet
Our historical on-time and cancellation record currently covers the US, UK, Brazil, and Australia, so we don’t score departure reliability at Keflavik International 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 Reykjavík
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 · 92/100 favorability
Roughest month
Most disruptive — high winds, low visibility & fog · 84/100 favorability
Connecting through KEF
How much layover you really need
Based on 43 sellable international itineraries seen through Google Flights. Median observed layover: 585 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 KEF
What the numbers say about flying through Keflavik International Airport
PlaneSane doesn't yet have on-time and cancellation history for Keflavik 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, Reykjavík is an unusually calm-weather airport year-round. May is the calmest stretch for flying, scoring 92 out of 100 for favorable conditions, while January is the most disruptive at 84, driven mainly by high winds 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 KEF, give yourself room. An international transfers around 69 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 Reykjavík, 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 KEF
- What is the best month to fly from KEF for good weather?
- May has the calmest flying weather at Keflavik International Airport. January is the most disruptive, mainly from high winds and low visibility & fog.
- How much layover time do you need at KEF?
- Allow at least about 69 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 Reykjavík
Hotels scored on cleanliness, location, price fairness, and trust — not just stars.
Reliability guides
Planning a trip through Reykjavík?
Score real flights to and from KEF on reliability, weather, and connection safety — not just price.
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