Flight profile · JetBlue
B6317
Boston (BOS) to New York (JFK) · scheduled 7:40 PM – 9:00 PM
How B6317 performs
629 operations, July 2023 – August 2026.
Between its first and last recorded date on BOS → JFK, B6317 averaged about 4 operations a week (629 in 1,158 days, cancelled ones included).
B6317 arrived on time 53.6% of the time, against 76.8% for all BOS → JFK flights, so this departure is 23.2 percentage points worse than the route as a whole. Against JetBlue’s own flights on this route it is 19.6 points worse.
Source: US DOT Bureau of Transportation Statistics · 629 operations, July 2023 – August 2026 · If B6317 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
What stands out
How B6317 compares to other flight numbers, not just to itself.
This flight's worst arrivals run unusually far past its typical one, a bigger gap than 99% of 12,358 comparable flight numbers.
A typical arrival is 8 min late, but the worst tenth run 132 minutes worse than that.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026 · The one thing about this specific departure that ranks most extreme against every other published flight number, out of everything FlyerIntel checks — shown only when something clears a real statistical bar, not for every flight.
Where B6317 is right now
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| B6317 | 53.6% | 6.20% | 8 min | 27.8% | 629 |
| JetBlue on BOS → JFK | 73.2% | 3.30% | -6 min | 11.8% | 7,797 |
| All BOS → JFK flights | 76.8% | 3.66% | -7 min | 9.6% | 17,722 |
B6317 has cancelled 6.20% of its scheduled departures (39 of 629), against 3.66% for all BOS → JFK flights — this specific departure cancels 2.5 percentage points more often than the route as a whole. Different flight numbers on the same route can carry different aircraft, crews and schedules, so this is a fact about B6317 specifically, not about the route it flies.
27.8% of B6317’s arrivals were an hour or more late, against 9.6% across BOS → JFK, so the long delays are more common on this number than on the route.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026
Why B6317 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
crew, maintenance, boarding and fueling, all within the carrier’s control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for B6317 on BOS → JFK. Only delays of 15 minutes or more are attributed. What the five causes mean
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – August 2026
Does a late aircraft delay this flight?
How often the plane that flies B6317 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, B6317 pushed back an average of 80 minutes late; when it came in on time or early, an average of 21 minutes late.
Matched by tail number to the aircraft’s previous flight into BOS: 522 of 591 departures. Unknown, cancelled or diverted inbounds and gaps over 12 hours are left out.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| B6317 | 40% | 77% | 30% |
| Network, same turn | 17% | 69% | 9% |
79 scheduled minutes is enough to clean and board when the aircraft is on time, with little to spare when it is not.
The network row is every flight with a scheduled turn of 60 to 89 minutes. How often B6317’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often B6317 left 15 or more minutes late is higher than the network’s.
Which Flight Numbers Pay for a Late Aircraft ranks the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – August 2026
From pushback to gate
When it leaves BOS late, does that still matter by the time it reaches JFK?
B6317 pushes back an average of 47.2 minutes late and reaches the gate at JFK an average of 39.9 minutes late. The 7.3 minutes between those two figures are slack the published schedule already carries, so a late pushback is partly, not fully, made up before the gate. It spends 20.5 minutes on the taxiways at BOS, 1.2 minutes shorter than a typical BOS departure in the same hour.
On arrival at JFK, B6317 spends 10.5 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is 1.0 minutes shorter than a typical JFK arrival (11.5 min).
Taxi-out is gate to wheels up and sits inside the scheduled block; the hourly comparison is 24,922 BOS departures. Taxi-in is landing to gate, set against 360,684 arrivals at JFK. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026
The hour it leaves BOS
B6317 has one departure time, 7:40 PM, so this is what that hour at BOS is worth.
On-time arrival rate. 24,922 departures from BOS are scheduled in the 7 PM–8 PM hour over the period, against 454,081 across the whole day.
B6317 is scheduled out of BOS at 7:40 PM, in the 7 PM–8 PM bank. Departures from BOS in that hour arrive on time 64.9% of the time against 77.0% across the airport’s whole day — the slot alone is worth 12.1 points worse before anything about this particular flight is considered.
Both airport figures cover every destination from BOS, so they describe the slot, not this journey; the route comparison is above. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026 · Hours below 120 departures are not scored.
Other routes B6317 has flown
Carriers reassign flight numbers. B6317 also served this other city pair in the period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| BDL→RSW Hartford to Fort Myers | December 3–18, 2024 | 16 | — |
The figures above describe only BOS → JFK, the route B6317 flies now.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
140 min late
against a median of 8 min late
B6317 has an average that understates its risk: a typical arrival is 8 min late, but the worst tenth are 132 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 629 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – August 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| DL2611 | Delta Air Lines | 90.0% | 13 min early | 900 |
| YX5720 | Republic Airways | 86.5% | 8 min early | 802 |
| B6217 | JetBlue | 82.6% | 9 min early | 741 |
| B6717 | JetBlue | 72.0% | 4 min early | 718 |
| B61117 | JetBlue | 70.1% | 6 min early | 655 |
| B6517 | JetBlue | 69.7% | 3 min early | 656 |
| B6317 this flight | JetBlue | 53.6% | 8 min late | 629 |
Among all 7 departures on this route with at least 600 operations, B6317 has the lowest on-time rate, 36.4 points behind the best. Every departure here has at least 600 operations; the other rows are the most punctual on the route, not all of them.
Data and methodology
Calculated by FlyerIntel from 629 records of B6317 operating BOS → JFK, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule; cancelled and diverted flights are reported separately, not in the on-time rate.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
Analysis last recomputed