Flight number record
B6 348
JetBlue Airways · Las Vegas to New York
- Route
- LAS → JFK
- Departs
- 11:35
- Flights
- 317
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s B6 348, check with JetBlue Airways.
B6 348 sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.3%. The late ones land an hour and a half behind schedule. That rests on 317 flights, with a median arrival 4 minutes early.
The national on-time rate over the same period is 77.3%, so B6 348 runs 7 points behind the country as a whole. Across a thousand flights that is about 73 extra late arrivals.
Key figures
On time
70.0%
Arrivals under 15 minutes late, of 297 completed flights
Avg delay
86 min
Across delayed arrivals only, not all flights
Cancelled
5.99%
National rate is 1.89%
1 hour+ late
13.1%
National rate is 8.3%
These figures cover 317 flights between September 2025 and August 2026. Beyond the headline rate, 13.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When B6 348 flies
B6 348 flies LAS to JFK without a single fixed slot. Its most common scheduled departure was 11:35, used on 46 of 317 flights, with 13:35 (45 flights) next.
- Departs 11:3546 flights14.5%
- Departs 13:3545 flights14.2%
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 11:35 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and B6 348 runs 8 points worse at 70.0%. 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 348 next to LAS to JFK
Every carrier on LAS to JFK combined arrived on time 80.0% of the time across 3,717 flights, so B6 348 is 10 points behind it. JetBlue flew 1,380 flights on the same city pair under all its flight numbers, including this one, and those ran 76.7% on time. Across its whole network JetBlue Airways managed 71.3%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| B6 348thin sample | 317 | 70.0% | 86 min | 5.99% | C− |
| All JetBlue Airways on LAS–JFK | 1,380 | 76.7% | 94 min | 3.70% | B− |
| All carriers on LAS–JFK | 3,717 | 80.0% | 85 min | 2.96% | B |
| JetBlue Airways, whole network | 240,615 | 71.3% | 77 min | 3.56% | C− |
Across the year
B6 348 quarter by quarter
B6 348 did not run the same all year. Its best quarter was Apr–Jun 2026 at 78.8% on time and its weakest Jul–Sep 2026 at 53.7%, a swing of 25 points on roughly 79 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 202526 flights—
- Oct–Dec 202583 flights77.5%
- Jan–Mar 202670 flights62.7%
- Apr–Jun 202685 flights78.8%
- Jul–Sep 202653 flights53.7%
Scale runs 45% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, B6 348 did best on Wednesday at 80.4% on time and worst on Sunday at 56.5%. Each day rests on about 45 flights, so a gap of 24 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late B6 348 runs when it is late
B6 348 often beats the schedule: 101 of 297 completed flights, 34%, arrived 15 minutes or more early. The 89 late arrivals split 27 under half an hour, 23 between 30 and 60 minutes, and 39 an hour or more.
- 15+ min early101 flights34.0%
- Within 15 min107 flights36.0%
- 15–29 min late27 flights9.1%
- 30–59 min late23 flights7.7%
- 1–2 hours late23 flights7.7%
- 2+ hours late16 flights5.4%
Scale runs 0% to 100%.
Share of 297 completed flights by arrival against schedule.
19 of 90 late departures made up the time and arrived on time, 21% of them. In the other direction, 18 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 JFK.
The worst days
Worst days for B6 348
The latest arrival of the period was on 21 August 2026, 20 hours 22 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 21 August 2026 | 20 hours 22 minutes | Carrier |
| 14 December 2025 | 6 hours 27 minutes | Late-arriving aircraft |
| 15 March 2026 | 4 hours 40 minutes | National Airspace System |
| 23 August 2026 | 3 hours 54 minutes | Late-arriving aircraft |
| 4 March 2026 | 3 hours 19 minutes | Late-arriving aircraft |
Delay causes
Why B6 348 runs late
National Airspace System accounts for 45% of the 7,627 delay minutes carriers reported here, and the remaining four split what is left.
- 45%National Airspace System
- 29%Carrier
- 24%Late-arriving aircraft
- 2%Extreme weather
45% 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 3,433 minutes out of 7,627, against a national NAS share of 21%. The split is drawn from 7,627 delay minutes reported on B6 348.
Cancellations run at 5.99%, 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
13.1% 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 2,248 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 317 flights under B6 348 in the data flew LAS 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. 317 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 348
For a booking, the cancellation rate is the figure to plan around on B6 348: 5.99% of its 317 scheduled flights did not operate. A late arrival costs an hour and a half, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- LAS to JFK, every carrier and departure
- JFK to LAS, the return direction
- Delta Air Lines 333 on the same route84.4%
- Delta Air Lines 510 on the same route93.8%
- JetBlue Airways 948 on the same route70.1%
- Delta Air Lines 795 on the same route75.5%
- Harry Reid International (LAS) 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
- The best time of day to fly, according to 7.05 million flight records
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.