How reliable is John F Kennedy International Airport?
Flights from JFK departed within 15 minutes of schedule in 79% of 708,206 flights in official BTS history — and weather is calmest in Sep. Here’s the full picture before you book.
Reliability score
on-time, cancellations & delays
Weather favorability
year-round climate
Origin-airport operations
What the departure punctuality at JFK looks like
On-time departures
across 708,206 flights
Source: BTS Airport Operations · data through 2026-08-08. Role-specific BTS departure history; advisory context, not a guarantee for any flight.
Weather by month
When the weather works for you at New York
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 · 85/100 favorability
Connecting through JFK
How much layover you really need
Based on 37 sellable domestic itineraries seen through Google Flights. Median observed layover: 100 min.
International transfers add immigration and bag recheck — give yourself this buffer at JFK or more.
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 JFK
What the numbers say about flying through John F Kennedy International Airport
Across official performance history, flights from New York left within 15 minutes of schedule about 79% of the time over 708,206 flights. That's a respectable but unspectacular operational record. Pair it with an elevated cancellation rate of 2.7% — worth weighing alongside the on-time figure. When a departure does run late, the typical delay is around 14 minutes.
On weather, New York is an unusually calm-weather airport year-round. September is the calmest stretch for flying, scoring 96 out of 100 for favorable conditions, while March is the most disruptive at 85, 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 JFK, give yourself room. Real itineraries sold through JFK bottom out around 71 minutes for a domestic connection, and international transfer wants roughly 105 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 New York, 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 JFK
- How reliable is John F Kennedy International Airport (JFK)?
- Flights from New York left within 15 minutes of schedule roughly 79% of the time across 708,206 flights of official history — a respectable but unspectacular operational record. The cancellation rate runs about 2.7%. It's advisory context, not a guarantee for any single flight.
- What is the best month to fly from JFK for good weather?
- September has the calmest flying weather at John F Kennedy International Airport. March is the most disruptive, mainly from low visibility & fog and high winds.
- How much layover time do you need at JFK?
- Allow at least about 71 minutes for a domestic connection and about 105 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 New York?
Score real flights to and from JFK on reliability, weather, and connection safety — not just price.