Flight number record

B6 318

JetBlue Airways · New York to Boston

Route: JFK → BOS
Departs: 14:45
Flights: 301
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s B6 318, check with JetBlue Airways.

B6 318 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 301 flights, with a median arrival 7 minutes early.

The national on-time rate over the same period is 77.6%, so B6 318 runs 11 points behind the country as a whole. Across a thousand flights that is about 114 extra late arrivals.

On time

66.2%

Arrivals under 15 minutes late, of 287 completed flights

Avg delay

85 min

Across delayed arrivals only, not all flights

Cancelled

4.65%

National rate is 1.81%

1 hour+ late

16.0%

National rate is 8.1%

These figures cover 301 flights between July 2025 and June 2026. Beyond the headline rate, 16.0% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When B6 318 flies

B6 318 flies JFK to BOS without a single fixed slot. Its most common scheduled departure was 14:45, used on 52 of 301 flights, with 11:00 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 14:4552 flights17.3%
Departs 11:0035 flights11.6%

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 14:45 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and B6 318 runs 6 points worse at 66.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

B6 318 next to JFK to BOS

Every carrier on JFK to BOS combined arrived on time 73.7% of the time across 5,744 flights, so B6 318 is 8 points behind it. JetBlue flew 2,460 flights on the same city pair under all its flight numbers, including this one, and those ran 69.7% on time. Across its whole network JetBlue Airways managed 72.7%, which this flight trails by 7 points.

B6 318 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 318thin sample	301	66.2%	85 min	4.65%	C−
All JetBlue Airways on JFK–BOS	2,460	69.7%	79 min	4.07%	C−
All carriers on JFK–BOS	5,744	73.7%	78 min	4.18%	C−
JetBlue Airways, whole network	234,468	72.7%	76 min	2.56%	C

Across the year

B6 318 quarter by quarter

B6 318 did not run the same all year. Its best quarter was Apr–Jun 2026 at 88.0% on time and its weakest Jul–Sep 2025 at 44.2%, a swing of 44 points on roughly 75 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 flights44.2%
Oct–Dec 202590 flights70.9%
Jan–Mar 202669 flights72.3%
Apr–Jun 202650 flights88.0%

Scale runs 35% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, B6 318 did best on Wednesday at 76.7% on time and worst on Friday at 51.2%. Each day rests on about 43 flights, so a gap of 26 points is worth noticing but could still narrow in another year.

Delay causes

Why B6 318 runs late

One category carries most of the weight here. National Airspace System accounts for 54% of the 8,203 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.

National Airspace System
54%
Late-arriving aircraft
31%
Carrier
13%
Extreme weather
2%

54% 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 4,452 minutes out of 8,203, against a national NAS share of 21%. The split is drawn from 8,203 delay minutes reported on B6 318.

Cancellations run at 4.65%, against 1.81% 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 16.0% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

Every one of the 301 flights under B6 318 in the data flew JFK to BOS. 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. 301 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 318

For a booking, the cancellation rate is the figure to plan around on B6 318: 4.65% of its 301 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.

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