Flight number record
B6 1273
JetBlue Airways · New York to Charleston
- Route
- JFK → CHS
- Departs
- 08:10
- Flights
- 343
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s B6 1273, check with JetBlue Airways.
B6 1273 sits in the middle of the pack with a C−. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 343 flights, with a median arrival 7 minutes early.
Key figures
On time
73.5%
Arrivals under 15 minutes late, of 324 completed flights
Avg delay
64 min
Across delayed arrivals only, not all flights
Cancelled
5.25%
National rate is 1.89%
1 hour+ late
9.3%
National rate is 8.3%
These figures cover 343 flights between September 2025 and August 2026. Beyond the headline rate, 9.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When B6 1273 flies
B6 1273 flies JFK to CHS without a single fixed slot. Its most common scheduled departure was 08:10, used on 53 of 343 flights, with 08:05 (50 flights) and 07:55 (48 flights) next.
- Departs 08:1053 flights15.5%
- Departs 08:0550 flights14.6%
- Departs 07:5548 flights14.0%
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 08:10 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and B6 1273 runs 10 points worse at 73.5%. 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 1273 next to JFK to CHS
Every carrier on JFK to CHS combined arrived on time 74.3% of the time across 791 flights, so B6 1273 is about level with it. JetBlue flew 638 flights on the same city pair under all its flight numbers, including this one, and those ran 72.8% on time. Across its whole network JetBlue Airways managed 71.3%, which this flight beats by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| B6 1273thin sample | 343 | 73.5% | 64 min | 5.25% | C− |
| All JetBlue Airways on JFK–CHS | 638 | 72.8% | 70 min | 5.80% | C− |
| All carriers on JFK–CHS | 791 | 74.3% | 69 min | 6.45% | C− |
| JetBlue Airways, whole network | 240,615 | 71.3% | 77 min | 3.56% | C− |
Across the year
B6 1273 quarter by quarter
B6 1273 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Jul–Sep 2026 at 56.4%, a swing of 40 points on roughly 69 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 202530 flights96.7%
- Oct–Dec 202587 flights64.6%
- Jan–Mar 202673 flights70.6%
- Apr–Jun 202691 flights86.5%
- Jul–Sep 202662 flights56.4%
Scale runs 50% to 100%.
By weekday, B6 1273 did best on Friday at 83.7% on time and worst on Sunday at 57.1%. Each day rests on about 49 flights, so a gap of 27 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late B6 1273 runs when it is late
B6 1273 often beats the schedule: 112 of 324 completed flights, 35%, arrived 15 minutes or more early. The 86 late arrivals split 32 under half an hour, 24 between 30 and 60 minutes, and 30 an hour or more.
- 15+ min early112 flights34.6%
- Within 15 min126 flights38.9%
- 15–29 min late32 flights9.9%
- 30–59 min late24 flights7.4%
- 1–2 hours late21 flights6.5%
- 2+ hours late9 flights2.8%
Scale runs 0% to 100%.
Share of 324 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 71 departures that left 15 minutes late or more, only 6 made it up before arrival. 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 CHS.
The worst days
Worst days for B6 1273
The latest arrival of the period was on 9 November 2025, 5 hours 38 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in July 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 9 November 2025 | 5 hours 38 minutes | Carrier |
| 10 July 2026 | 4 hours 19 minutes | Carrier |
| 4 July 2026 | 4 hours 5 minutes | National Airspace System |
| 14 December 2025 | 3 hours 34 minutes | Late-arriving aircraft |
| 26 July 2026 | 3 hours 34 minutes | Carrier |
Delay causes
Why B6 1273 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 5,516 reported delay minutes.
- 39%Carrier
- 30%National Airspace System
- 27%Late-arriving aircraft
- 3%Extreme weather
The largest share of delay minutes, 39%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,176 of the 5,516 delay minutes reported here. The split is drawn from 5,516 delay minutes reported on B6 1273.
Cancellations run at 5.25%, against 1.89% nationally. That is about one flight in twenty 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
9.3% 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 343 flights under B6 1273 in the data flew JFK to CHS. 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. 343 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 1273
For a booking, the cancellation rate is the figure to plan around on B6 1273: 5.25% of its 343 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- JFK to CHS, every carrier and departure
- CHS to JFK, the return direction
- JetBlue Airways 2473 on the same route71.4%
- John F. Kennedy International (JFK) delay statistics
- Charleston International (CHS) 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.