Carrier route record
B6BNA→BOS
JetBlue Airways · Nashville to Boston
- Flights
- 874
- Period
- July 2025 to June 2026
- Share of route
- 30%
- Carriers
- 6
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with JetBlue Airways.
JetBlue on BNA to BOS sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 874 flights. The strongest carrier on the route with a full sample, Republic Airways, flew 500 at 80.9% on time.
Republic Airways is the most reliable of the three carriers covered here at 80.9% on time across 500 flights.
Key figures
On time
70.5%
Arrivals under 15 minutes late, of 853 completed flights
Avg delay
70 min
Across delayed arrivals only, not all flights
Cancelled
2.29%
National rate is 1.81%
Whole route
69.0%
Every carrier on BNA to BOS, 2,946 flights
These figures cover 874 flights between July 2025 and June 2026. Beyond the headline rate, 12.2% 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 BNA to BOS
JetBlue flew 874 of the 2,946 flights on BNA to BOS, about 30% of it. Its 70.5% on time is 2 points better than the route as a whole, which runs 69.0%. Ranked by on-time rate it is number four of six carriers on the route, where the range runs from American at 100.0% to Southwest at 60.6%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. Republic Airways arrives on time 80.9% of the time; Southwest Airlines manages 60.6%. Sample sizes sit next to every figure, because a two-point gap across 997 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| American Airlinesthin sample | 2 | 100.0% | — | 0.00% | A+ |
| Republic Airways | 500 | 80.9% | 90 min | 3.60% | B− |
| Delta Air Lines | 533 | 71.5% | 105 min | 0.75% | C+ |
| JetBlue Airways (this page) | 874 | 70.5% | 70 min | 2.29% | C |
| Spirit Airlinesthin sample | 40 | 65.8% | 125 min | 5.00% | C− |
| Southwest Airlines | 997 | 60.6% | 53 min | 1.40% | D |
Republic Airways cancels 3.6% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
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 44 points, against 20 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am175 flights91.3%
- 8am–11am209 flights69.6%
- 11am–2pm176 flights69.6%
- 2pm–5pm75 flights47.3%
- 5pm–8pm158 flights60.9%
- 8pm–5am81 flights69.1%
Scale runs 40% to 95%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 91.3% of the time, against 47.3% for the afternoon window. That is 44 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 209 flights scheduled in it.
Across the year
JetBlue on BNA to BOS through the year
Delays peak in September, when the on-time rate falls to 51.8%. March is the strongest month at 81.6%. Moving a flexible trip across that boundary buys 30 points. October was the busiest month here, with 112 flights.
Across the week, Saturday is the strongest day at 85.0% on time and Thursday the weakest at 60.2%. 25 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 18,000 reported delay minutes.
- 41%Late-arriving aircraft
- 34%National Airspace System
- 24%Carrier
- 0%Extreme weather
41% 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 18,000 reported delay minutes here, that single category outweighs weather by 41 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 17,625 reported delay minutes.
34% 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 6,068 minutes out of 18,000, against a national NAS share of 21%.
Cancellations sit at 2.29% against a national 1.81%, which is ordinary. Diversions add another 0.11%.
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. 12.2% 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.
The 942 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 72.1% on time across 874 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. 874 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 BNA to BOS
Put together: treat all of this as provisional. 874 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 70.5% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 853 completed flights over 12 months sit behind that.
Related
Where to go next
- BNA to BOS, every carrier
- JetBlue on BOS to BNA, the return leg
- Republic Airways on BNA to BOS80.9%
- Delta Air Lines on BNA to BOS71.5%
- Southwest Airlines on BNA to BOS60.6%
- JetBlue Airways network-wide record
- Nashville International (BNA) delay statistics
- Boston Logan International (BOS) delay statistics
- Why the first flight of the morning is statistically safest
- Same route, different airline: where the carrier you pick matters most
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.