Flight number record
B6 1274
JetBlue Airways · Charleston to New York
- Route
- CHS → JFK
- Departs
- 20:14
- Flights
- 264
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s B6 1274, check with JetBlue Airways.
B6 1274 draws a C−. About one flight in three arrives at least 15 minutes late, and the typical late arrival is an hour and a half behind schedule. Build slack into anything you connect to. That rests on 264 flights, with a median arrival 1 minute early.
The national on-time rate over the same period is 77.3%, so B6 1274 runs 12 points behind the country as a whole. Across a thousand flights that is about 123 extra late arrivals.
Key figures
On time
65.0%
Arrivals under 15 minutes late, of 243 completed flights
Avg delay
95 min
Across delayed arrivals only, not all flights
Cancelled
7.58%
National rate is 1.89%
1 hour+ late
15.6%
National rate is 8.3%
These figures cover 264 flights between September 2025 and August 2026. Beyond the headline rate, 15.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When B6 1274 flies
B6 1274 flies CHS to JFK without a single fixed slot. Its most common scheduled departure was 20:14, used on 34 of 264 flights, with 19:00 (27 flights) next.
- Departs 20:1434 flights12.9%
- Departs 19:0027 flights10.2%
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 20:14 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and B6 1274 runs 5 points worse at 65.0%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
B6 1274 next to CHS to JFK
Every carrier on CHS to JFK combined arrived on time 73.5% of the time across 789 flights, so B6 1274 is 9 points behind it. JetBlue flew 637 flights on the same city pair under all its flight numbers, including this one, and those ran 72.5% on time. Across its whole network JetBlue Airways managed 71.3%, which this flight trails by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| B6 1274thin sample | 264 | 65.0% | 95 min | 7.58% | C− |
| All JetBlue Airways on CHS–JFK | 637 | 72.5% | 87 min | 5.81% | C− |
| All carriers on CHS–JFK | 789 | 73.5% | 84 min | 6.46% | C− |
| JetBlue Airways, whole network | 240,615 | 71.3% | 77 min | 3.56% | C− |
Across the year
B6 1274 quarter by quarter
B6 1274 did not run the same all year. Its best quarter was Apr–Jun 2026 at 72.2% on time and its weakest Jul–Sep 2026 at 46.5%, a swing of 26 points on roughly 88 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 202518 flights—
- Oct–Dec 202586 flights66.3%
- Jan–Mar 202622 flights—
- Apr–Jun 202681 flights72.2%
- Jul–Sep 202657 flights46.5%
Scale runs 40% to 80%. Rows with fewer than 30 flights show a dash.
By weekday, B6 1274 ranged from 59.5% on Sunday to 69.2% on Friday. With about 38 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late B6 1274 runs when it is late
B6 1274 often beats the schedule: 63 of 243 completed flights, 26%, arrived 15 minutes or more early. The 85 late arrivals split 21 under half an hour, 26 between 30 and 60 minutes, and 38 an hour or more.
- 15+ min early63 flights25.9%
- Within 15 min95 flights39.1%
- 15–29 min late21 flights8.6%
- 30–59 min late26 flights10.7%
- 1–2 hours late21 flights8.6%
- 2+ hours late17 flights7.0%
Scale runs 0% to 100%.
Share of 243 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 79 departures that left 15 minutes late or more, only 9 made it up before arrival. In the other direction, 15 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 1274
The latest arrival of the period was on 6 August 2026, 15 hours 49 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 |
|---|---|---|
| 6 August 2026 | 15 hours 49 minutes | Carrier |
| 19 December 2025 | 15 hours 11 minutes | Carrier |
| 10 June 2026 | 5 hours 15 minutes | Late-arriving aircraft |
| 8 August 2026 | 4 hours 3 minutes | Late-arriving aircraft |
| 30 November 2025 | 3 hours 49 minutes | Late-arriving aircraft |
Delay causes
Why B6 1274 runs late
Late-arriving aircraft accounts for 43% of the 8,038 delay minutes carriers reported here, and the remaining four split what is left.
- 43%Late-arriving aircraft
- 31%Carrier
- 25%National Airspace System
- 1%Extreme weather
43% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 8,038 reported delay minutes here, that single category outweighs weather by 43 to one. The split is drawn from 8,038 delay minutes reported on B6 1274.
Cancellations run at 7.58%, against 1.89% nationally. That is roughly one flight in twelve 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
15.6% 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.
The 636 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 264 flights under B6 1274 in the data flew CHS 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. 264 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 1274
For a booking, the cancellation rate is the figure to plan around on B6 1274: 7.58% of its 264 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
- CHS to JFK, every carrier and departure
- JFK to CHS, the return direction
- JetBlue Airways 2474 on the same route76.8%
- Charleston International (CHS) 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
- 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.