Carrier route record

B6PIT→BOS

JetBlue Airways · Pittsburgh to Boston

Flights: 1,007
Period: July 2025 to June 2026
Share of route: 47%
Carriers: 2

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

JetBlue on PIT to BOS lands a B−, about a point worse than the national rate of 77.6%. About one flight in four arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That is a workable record, not a spotless one. That rests on 1,007 flights, with a median arrival 8 minutes early.

The US average over the same twelve months is 77.6%, so there is little to separate JetBlue on PIT to BOS from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

76.5%

Arrivals under 15 minutes late, of 975 completed flights

Avg delay

85 min

Across delayed arrivals only, not all flights

Cancelled

3.18%

National rate is 1.81%

Whole route

79.3%

Every carrier on PIT to BOS, 2,151 flights

These figures cover 1,007 flights between July 2025 and June 2026. Beyond the headline rate, 10.2% 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.

Carrier by carrier

JetBlue against every carrier on PIT to BOS

JetBlue flew 1,007 of the 2,151 flights on PIT to BOS, about 47% of it. Its 76.5% on time is 3 points worse than the route as a whole, which runs 79.3%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from Republic at 81.8% to JetBlue at 76.5%.

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

On-time performance by carrier on PIT to BOS
Airline	Flights	On time	Avg delay	Cancelled	Grade
Republic Airways	1,144	81.8%	62 min	2.53%	B
JetBlue Airways (this page)	1,007	76.5%	85 min	3.18%	B−

Flight by flight

JetBlue flight numbers on PIT to BOS

Departure window

When JetBlue runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 32 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am158 flights92.1%
8am–11am319 flights84.9%
11am–2pm138 flights75.2%
2pm–5pm136 flights59.7%
5pm–8pm189 flights67.2%
8pm–5am67 flights61.9%

Scale runs 50% to 100%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 92.1% of the time, against 59.7% for the afternoon window. That is 32 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 319 flights scheduled in it.

Across the year

JetBlue on PIT to BOS through the year

Darker means more delays. Figures are on-time percentages.April best, July worst

July is the worst month at 67.3% on time, 22 points below April, the best at 89.3%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. June was the busiest month here, with 109 flights.

Across the week, Saturday is the strongest day at 84.5% on time and Sunday the weakest at 71.0%. 14 points is a smaller lever than departure hour, but it is free.

Delay causes

Why JetBlue runs late on this route

One category carries most of the weight here. Late-arriving aircraft accounts for 43% of the 19,000 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.

Late-arriving aircraft
43%
National Airspace System
32%
Carrier
18%
Extreme weather
6%

43% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 19,000 reported delay minutes here, that single category outweighs weather by 7 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 19,398 reported delay minutes.

The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 92.1% on time here.

Cancellations run at 3.18%, 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 stage length

What a delay here costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.2% 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.

At 496 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 5am–8am window matters as much as it does.

The return leg runs 76.6% on time across 1,008 flights, within half a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.

One caution: this is a thin sample. 1,007 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 JetBlue on PIT to BOS

Put together: the delay figures matter less here than the 3.18% cancellation rate. A late arrival costs you an hour and a half; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 975 completed flights over 12 months sit behind that.

Where to go next

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