Flight number record
B6 519
JetBlue Airways · New York to Atlanta
- Route
- JFK → ATL
- Departs
- 06:50
- Flights
- 300
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s B6 519, check with JetBlue Airways.
B6 519 sits in the middle of the pack with a B−. Close to three flights in four arrive on time by the DOT's definition, about a point worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 300 flights, with a median arrival 8 minutes early.
Key figures
On time
75.9%
Arrivals under 15 minutes late, of 278 completed flights
Avg delay
71 min
Across delayed arrivals only, not all flights
Cancelled
7.33%
National rate is 1.89%
1 hour+ late
8.3%
National rate is 8.3%
These figures cover 300 flights between September 2025 and August 2026. Beyond the headline rate, 8.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When B6 519 flies
B6 519 flies JFK to ATL without a single fixed slot. Its most common scheduled departure was 06:50, used on 47 of 300 flights.
- Departs 06:5047 flights15.7%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 06:50 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and B6 519 runs 13 points worse at 75.9%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
B6 519 next to JFK to ATL
Every carrier on JFK to ATL combined arrived on time 75.5% of the time across 4,227 flights, so B6 519 is about level with it. JetBlue flew 1,113 flights on the same city pair under all its flight numbers, including this one, and those ran 66.5% on time. Across its whole network JetBlue Airways managed 71.3%, which this flight beats by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| B6 519thin sample | 300 | 75.9% | 71 min | 7.33% | B− |
| All JetBlue Airways on JFK–ATL | 1,113 | 66.5% | 77 min | 5.48% | C− |
| All carriers on JFK–ATL | 4,227 | 75.5% | 83 min | 2.77% | B |
| JetBlue Airways, whole network | 240,615 | 71.3% | 77 min | 3.56% | C− |
Across the year
B6 519 quarter by quarter
B6 519 did not run the same all year. Its best quarter was Apr–Jun 2026 at 88.9% on time and its weakest Oct–Dec 2025 at 58.3%, a swing of 31 points on roughly 75 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 20252 flights—
- Oct–Dec 202566 flights58.3%
- Jan–Mar 202679 flights78.9%
- Apr–Jun 202691 flights88.9%
- Jul–Sep 202662 flights70.9%
Scale runs 50% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, B6 519 did best on Thursday at 84.1% on time and worst on Sunday at 70.0%. Each day rests on about 43 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late B6 519 runs when it is late
B6 519 often beats the schedule: 94 of 278 completed flights, 34%, arrived 15 minutes or more early. The 67 late arrivals split 26 under half an hour, 18 between 30 and 60 minutes, and 23 an hour or more.
- 15+ min early94 flights33.8%
- Within 15 min117 flights42.1%
- 15–29 min late26 flights9.4%
- 30–59 min late18 flights6.5%
- 1–2 hours late10 flights3.6%
- 2+ hours late13 flights4.7%
Scale runs 0% to 100%.
Share of 278 completed flights by arrival against schedule.
16 of 62 late departures made up the time and arrived on time, 26% of them. In the other direction, 21 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at ATL.
The worst days
Worst days for B6 519
The latest arrival of the period was on 30 December 2025, 5 hours 30 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 30 December 2025 | 5 hours 30 minutes | Late-arriving aircraft |
| 16 January 2026 | 3 hours 44 minutes | Late-arriving aircraft |
| 31 May 2026 | 3 hours 41 minutes | Carrier |
| 1 August 2026 | 3 hours 29 minutes | Late-arriving aircraft |
| 22 February 2026 | 3 hours 25 minutes | Late-arriving aircraft |
Delay causes
Why B6 519 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 4,741 reported delay minutes.
- 41%Carrier
- 36%Late-arriving aircraft
- 21%National Airspace System
- 3%Extreme weather
36% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,741 reported delay minutes here, that single category outweighs weather by 13 to one. The split is drawn from 4,741 delay minutes reported on B6 519.
Cancellations run at 7.33%, against 1.89% nationally. That is roughly one flight in fifteen cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
8.3% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
The 760 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
Every one of the 300 flights under B6 519 in the data flew JFK to ATL. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 300 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking B6 519
For a booking, the cancellation rate is the figure to plan around on B6 519: 7.33% of its 300 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- JFK to ATL, every carrier and departure
- ATL to JFK, the return direction
- Delta Air Lines 2286 on the same route90.2%
- Delta Air Lines 2342 on the same route86.1%
- Delta Air Lines 2227 on the same route83.4%
- Delta Air Lines 2293 on the same route76.3%
- Frontier Airlines 4731 on the same route66.1%
- JetBlue Airways 719 on the same route58.8%
- John F. Kennedy International (JFK) delay statistics
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- JetBlue Airways on-time record
- Every JetBlue Airways flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means JetBlue Airways’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.