Flight profile · JetBlue
B6355
New York (JFK) to Ontario (ONT) · scheduled 7:40 PM – 9:59 PM
How B6355 performs
675 operations, July 2023 – July 2026.
B6355 arrived on time 64.7% of the time, against 65.8% for all JFK → ONT flights, so this departure is 1.1 percentage points worse than the route as a whole. Against JetBlue’s own flights on this route it is 1.1 points worse.
Source: US DOT Bureau of Transportation Statistics · 675 operations, July 2023 – July 2026 · If B6355 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 B6355 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 94% of 11,788 comparable flight numbers.
A typical arrival is 2 min early, but the worst tenth run 103 minutes worse than that.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 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 B6355 is right now
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| B6355 | 64.7% | 2.37% | -2 min | 16.0% | 675 |
| JetBlue on JFK → ONT | 65.8% | 2.16% | -3 min | 15.4% | 742 |
| All JFK → ONT flights | 65.8% | 2.16% | -3 min | 15.4% | 742 |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
Why B6355 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for B6355 on JFK → ONT. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies B6355 comes in late, and what that does to the departure.
The aircraft flying B6355 came in 15 or more minutes late on 27% of the departures where its previous flight is known. There are not enough departures in both groups to say how the flight left after a late one and after an on-time one.
Each departure is matched to the flight the same aircraft flew into JFK just before it, using the tail number in the DOT file, 198 of 662 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late |
|---|---|
| B6355 | 27% |
| Network, same turn | 23% |
The schedule leaves a long gap on the ground, which gives a late aircraft room to catch up before this flight pushes back.
The network row is every flight with a scheduled turn of 90 minutes to 3 hours. How often B6355’s aircraft landed 15 or more minutes late is higher than the network’s. There are not enough departures in both groups to compare how it left.
More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
From pushback to gate
When it leaves JFK late, does that still matter by the time it reaches ONT?
B6355 pushes back an average of 25.7 minutes late and reaches the gate at ONT an average of 16.4 minutes late. The 9.2 minutes between those two figures are slack the published schedule already carries, which is why a late pushback on this flight does not reliably become a late arrival. Its 34.9 minutes on the taxiways at JFK is about what any departure from the airport in that hour spends.
On arrival at ONT, B6355 spends 5.2 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 about what any arrival at ONT spends on the ground before reaching the gate.
Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached ONT. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 21,522 departures from JFK scheduled in the clock hour B6355 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at ONT (79,947 flights), not just B6355’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
The hour it leaves JFK
Part of any flight’s record belongs to the clock rather than to the flight. B6355 has one departure time, so this is what that time is worth.
On-time arrival rate. 21,522 departures from JFK are scheduled in the 7 PM–8 PM hour over the period, against 351,635 across the whole day.
B6355 is scheduled out of JFK at 7:40 PM, in the 7 PM–8 PM bank. Departures from JFK in that hour arrive on time 69.2% of the time against 77.0% across the airport’s whole day — the slot alone is worth 7.8 points worse before anything about this particular flight is considered.
The two airport figures cover every departure from JFK to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Hours below 120 departures are not scored.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
101 min late
against a median of 2 min early
B6355 has an average that understates its risk: a typical arrival is 2 min early, but the worst tenth are 103 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 675 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Data and methodology
Calculated by FlyerIntel from 675 records of B6355 operating JFK → ONT, 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 excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
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
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