Flight number record
B6 424
JetBlue Airways · Los Angeles to New York
- Route
- LAX → JFK
- Departs
- 12:40
- Flights
- 332
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s B6 424, check with JetBlue Airways.
B6 424 lands a B−, about a point better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 332 flights, with a median arrival 10 minutes early.
Key figures
On time
78.7%
Arrivals under 15 minutes late, of 314 completed flights
Avg delay
73 min
Across delayed arrivals only, not all flights
Cancelled
4.22%
National rate is 1.89%
1 hour+ late
9.6%
National rate is 8.3%
These figures cover 332 flights between September 2025 and August 2026. Beyond the headline rate, 9.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When B6 424 flies
B6 424 flies LAX to JFK without a single fixed slot. Its most common scheduled departure was 12:40, used on 38 of 332 flights, with 12:35 (35 flights) and 09:49 (35 flights) next.
- Departs 12:4038 flights11.4%
- Departs 12:3535 flights10.5%
- Departs 09:4935 flights10.5%
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 12:40 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and B6 424 runs level with that at 78.7%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
B6 424 next to LAX to JFK
Every carrier on LAX to JFK combined arrived on time 77.5% of the time across 10,289 flights, so B6 424 is about level with it. JetBlue flew 3,479 flights on the same city pair under all its flight numbers, including this one, and those ran 77.9% on time. Across its whole network JetBlue Airways managed 71.3%, which this flight beats by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| B6 424thin sample | 332 | 78.7% | 73 min | 4.22% | B− |
| All JetBlue Airways on LAX–JFK | 3,479 | 77.9% | 70 min | 3.48% | B− |
| All carriers on LAX–JFK | 10,289 | 77.5% | 90 min | 2.90% | B |
| JetBlue Airways, whole network | 240,615 | 71.3% | 77 min | 3.56% | C− |
Across the year
B6 424 quarter by quarter
Quarter by quarter B6 424 held fairly steady: 80.5% in Oct–Dec 2025, 75.0% in Jan–Mar 2026, 80.0% in Apr–Jun 2026 and 71.1% in Jul–Sep 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202526 flights—
- Oct–Dec 202588 flights80.5%
- Jan–Mar 202679 flights75.0%
- Apr–Jun 202686 flights80.0%
- Jul–Sep 202653 flights71.1%
Scale runs 65% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, B6 424 did best on Wednesday at 89.8% on time and worst on Monday at 68.2%. Each day rests on about 47 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late B6 424 runs when it is late
B6 424 often beats the schedule: 124 of 314 completed flights, 39%, arrived 15 minutes or more early. The 67 late arrivals split 15 under half an hour, 22 between 30 and 60 minutes, and 30 an hour or more.
- 15+ min early124 flights39.5%
- Within 15 min123 flights39.2%
- 15–29 min late15 flights4.8%
- 30–59 min late22 flights7.0%
- 1–2 hours late18 flights5.7%
- 2+ hours late12 flights3.8%
Scale runs 0% to 100%.
Share of 314 completed flights by arrival against schedule.
16 of 68 late departures made up the time and arrived on time, 24% of them. 15 flights left on time and still arrived late.
The worst days
Worst days for B6 424
The latest arrival of the period was on 30 October 2025, 5 hours 23 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as national airspace system delay.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 30 October 2025 | 5 hours 23 minutes | Late-arriving aircraft |
| 24 February 2026 | 3 hours 24 minutes | National Airspace System |
| 10 June 2026 | 3 hours 12 minutes | National Airspace System |
| 6 July 2026 | 3 hours 11 minutes | National Airspace System |
| 8 December 2025 | 2 hours 35 minutes | Carrier |
Delay causes
Why B6 424 runs late
National Airspace System accounts for 59% of the 4,873 delay minutes carriers reported here, and the remaining four split what is left.
- 59%National Airspace System
- 24%Late-arriving aircraft
- 17%Carrier
59% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 2,854 minutes out of 4,873, against a national NAS share of 21%. The split is drawn from 4,873 delay minutes reported on B6 424.
Cancellations run at 4.22%, against 1.89% nationally. That is about one flight in 25 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
9.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 2,475 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
Every one of the 332 flights under B6 424 in the data flew LAX to JFK. 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. 332 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 424
For a booking, the cancellation rate is the figure to plan around on B6 424: 4.22% of its 332 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
- LAX to JFK, every carrier and departure
- JFK to LAX, the return direction
- Delta Air Lines 934 on the same route86.7%
- Delta Air Lines 960 on the same route83.1%
- American Airlines 118 on the same route83.6%
- American Airlines 307 on the same route74.6%
- Delta Air Lines 958 on the same route82.4%
- American Airlines 274 on the same route57.9%
- Los Angeles International (LAX) delay statistics
- John F. Kennedy International (JFK) 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
- What a cancellation rate actually tells you (and what it hides)
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.