Carrier route record
B6RDU→BOS
JetBlue Airways · Raleigh to Boston
- Flights
- 1,083
- Period
- July 2025 to June 2026
- Share of route
- 38%
- Carriers
- 4
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with JetBlue Airways.
JetBlue on RDU 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 a little over an hour on average. That is a workable record, not a spotless one. That rests on 1,083 flights, with a median arrival 11 minutes early.
The US average over the same twelve months is 77.6%, so there is little to separate JetBlue on RDU to BOS from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
76.4%
Arrivals under 15 minutes late, of 1,053 completed flights
Avg delay
79 min
Across delayed arrivals only, not all flights
Cancelled
2.77%
National rate is 1.81%
Whole route
78.8%
Every carrier on RDU to BOS, 2,815 flights
These figures cover 1,083 flights between July 2025 and June 2026. Beyond the headline rate, 9.9% 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 RDU to BOS
JetBlue flew 1,083 of the 2,815 flights on RDU to BOS, about 38% of it. Its 76.4% on time is 2 points worse than the route as a whole, which runs 78.8%. Ranked by on-time rate it is last of four carriers on the route, where the range runs from Frontier at 80.5% to JetBlue at 76.4%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
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.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Frontier Airlinesthin sample | 159 | 80.5% | 56 min | 0.00% | B+ |
| Delta Air Lines | 1,436 | 80.4% | 87 min | 2.51% | B |
| Republic Airwaysthin sample | 137 | 80.0% | 94 min | 5.11% | B− |
| JetBlue Airways (this page) | 1,083 | 76.4% | 79 min | 2.77% | B |
Flight by flight
JetBlue flight numbers on RDU 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 33 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–8am224 flights92.7%
- 8am–11am304 flights87.2%
- 11am–2pm45 flights72.7%
- 2pm–5pm195 flights60.0%
- 5pm–8pm224 flights64.8%
- 8pm–5am91 flights63.6%
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 92.7% of the time, against 60.0% for the afternoon window. That is 33 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 304 flights scheduled in it.
Across the year
JetBlue on RDU to BOS through the year
Delays peak in September, when the on-time rate falls to 65.7%. March is the strongest month at 85.9%. Moving a flexible trip across that boundary buys 20 points. October was the busiest month here, with 135 flights.
Across the week, Saturday is the strongest day at 83.8% on time and Thursday the weakest at 72.0%. 12 points is a smaller lever than departure hour, but it is free.
Delay causes
Why JetBlue runs late on this route
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 20,000 reported delay minutes.
- 42%Late-arriving aircraft
- 32%National Airspace System
- 26%Carrier
- 0%Extreme weather
42% 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 20,000 reported delay minutes here, that single category outweighs weather by 42 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 19,595 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 92.7% on time here.
Cancellations run at 2.77%, against 1.81% nationally. That is roughly one flight in 40 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. 9.9% 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.
The 612 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.
The return leg runs 74.0% on time across 1,084 flights, within 2 points 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. 1,083 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 RDU to BOS
Put together: treat all of this as provisional. 1,083 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 76.4% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 1,053 completed flights over 12 months sit behind that.
Related
Where to go next
- RDU to BOS, every carrier
- JetBlue on BOS to RDU, the return leg
- Frontier Airlines on RDU to BOS80.5%
- Delta Air Lines on RDU to BOS80.4%
- Republic Airways on RDU to BOS80.0%
- JetBlue Airways network-wide record
- Raleigh-Durham International (RDU) delay statistics
- Boston Logan International (BOS) delay statistics
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
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.