Flight number record

B6 1273

JetBlue Airways · New York to Charleston

Route: JFK → CHS
Departs: 08:00
Flights: 343
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s B6 1273, check with JetBlue Airways.

B6 1273 lands a B−, level with the national rate of 77.6%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 343 flights, with a median arrival 8 minutes early.

On time

78.2%

Arrivals under 15 minutes late, of 331 completed flights

Avg delay

62 min

Across delayed arrivals only, not all flights

Cancelled

3.50%

National rate is 1.81%

1 hour+ late

7.6%

National rate is 8.1%

These figures cover 343 flights between July 2025 and June 2026. The median arrival is 8 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Schedule

When B6 1273 flies

B6 1273 flies JFK to CHS without a single fixed slot. Its most common scheduled departure was 08:00, used on 69 of 343 flights, with 08:10 (53 flights) and 08:05 (50 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:0069 flights20.1%
Departs 08:1053 flights15.5%
Departs 08:0550 flights14.6%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 08:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and B6 1273 runs 6 points worse at 78.2%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

B6 1273 next to JFK to CHS

Every carrier on JFK to CHS combined arrived on time 75.3% of the time across 787 flights, so B6 1273 is 3 points ahead of it. JetBlue flew 634 flights on the same city pair under all its flight numbers, including this one, and those ran 74.1% on time. Across its whole network JetBlue Airways managed 72.7%, which this flight beats by 6 points.

B6 1273 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 1273thin sample	343	78.2%	62 min	3.50%	B−
All JetBlue Airways on JFK–CHS	634	74.1%	73 min	3.79%	C−
All carriers on JFK–CHS	787	75.3%	72 min	4.83%	B−
JetBlue Airways, whole network	234,468	72.7%	76 min	2.56%	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 88.0% on time and its weakest Oct–Dec 2025 at 64.6%, a swing of 23 points on roughly 86 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 202592 flights88.0%
Oct–Dec 202587 flights64.6%
Jan–Mar 202673 flights70.6%
Apr–Jun 202691 flights86.5%

Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, B6 1273 did best on Wednesday at 88.1% on time and worst on Sunday at 62.7%. Each day rests on about 49 flights, so a gap of 25 points is worth noticing but could still narrow in another year.

Delay causes

Why B6 1273 runs late

One category carries most of the weight here. Carrier accounts for 42% of the 4,466 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
42%
Late-arriving aircraft
28%
National Airspace System
26%
Extreme weather
4%

The largest share of delay minutes, 42%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,876 of the 4,466 delay minutes reported here. The split is drawn from 4,466 delay minutes reported on B6 1273.

Cancellations run at 3.50%, against 1.81% nationally. That is about one flight in 30 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

7.6% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

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: 3.50% 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.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures