Carrier route record
B6SJU→BDL
JetBlue Airways · San Juan to Hartford
- Flights
- 726
- Period
- September 2025 to August 2026
- Share of route
- 75%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with JetBlue Airways.
JetBlue on SJU to BDL sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 8 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 726 flights, with a median arrival right on schedule.
The national on-time rate over the same period is 77.3%, so JetBlue on SJU to BDL runs 8 points behind the country as a whole. Across a thousand flights that is about 79 extra late arrivals.
Key figures
On time
69.4%
Arrivals under 15 minutes late, of 705 completed flights
Avg delay
75 min
Across delayed arrivals only, not all flights
Cancelled
2.62%
National rate is 1.89%
Whole route
69.8%
Every carrier on SJU to BDL, 968 flights
These figures cover 726 flights between September 2025 and August 2026. Beyond the headline rate, 10.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Carrier by carrier
JetBlue against every carrier on SJU to BDL
JetBlue flew 726 of the 968 flights on SJU to BDL, most of the route. Its 69.4% on time is about level with the route as a whole at 69.8%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from Frontier at 71.0% to JetBlue at 69.4%. One 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 | 242 | 71.0% | 51 min | 1.24% | C |
| JetBlue Airways (this page) | 726 | 69.4% | 75 min | 2.62% | C |
Flight by flight
JetBlue flight numbers on SJU to BDL
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
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 19 points, against half a point between the best and worst carrier.
- 5am–8am307 flights79.1%
- 8am–11am—
- 11am–2pm59 flights66.1%
- 2pm–5pm128 flights60.5%
- 5pm–8pm228 flights62.2%
- 8pm–5am4 flights—
Scale runs 50% to 85%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 79.1% of the time, against 60.5% for the afternoon window. That is 19 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 307 flights scheduled in it.
Across the year
JetBlue on SJU to BDL through the year
May is the best month on the calendar at 86.9% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. December was the busiest month here, with 76 flights.
Across the week, Wednesday is the strongest day at 73.9% on time and Saturday the weakest at 65.7%, a spread of 8 points.
Arrival by arrival
How late JetBlue on SJU to BDL runs when it is late
The 216 late arrivals split 72 under half an hour, 67 between 30 and 60 minutes, and 77 an hour or more.
- 15+ min early151 flights21.4%
- Within 15 min338 flights47.9%
- 15–29 min late72 flights10.2%
- 30–59 min late67 flights9.5%
- 1–2 hours late45 flights6.4%
- 2+ hours late32 flights4.5%
Scale runs 0% to 100%.
Share of 705 completed flights by arrival against schedule.
29 of 173 late departures made up the time and arrived on time, 17% of them. In the other direction, 72 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at BDL.
The worst days
Worst days for JetBlue on SJU to BDL
The latest arrival of the period was on 21 September 2025, 17 hours 29 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 21 September 2025 | 17 hours 29 minutes | Carrier |
| 31 October 2025 | 13 hours 44 minutes | Late-arriving aircraft |
| 12 August 2026 | 6 hours 59 minutes | Carrier |
| 7 February 2026 | 6 hours 36 minutes | Late-arriving aircraft |
| 18 March 2026 | 6 hours 35 minutes | Late-arriving aircraft |
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 16,000 reported delay minutes.
- 40%Late-arriving aircraft
- 37%Carrier
- 22%National Airspace System
- 1%Extreme weather
- 0%Security
40% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 16,000 reported delay minutes here, that single category outweighs weather by 40 to one. The split is drawn from 16,109 reported delay minutes.
The largest share of delay minutes, 37%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 6,039 of the 16,000 delay minutes reported here.
Cancellations run at 2.62%, against 1.89% nationally. That is about 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
10.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 1,666 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The return leg is a different operation and performs like one: it runs 59.9% on time across 727 flights, 10 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 10 points of difference.
One caution: this is a thin sample. 726 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 SJU to BDL
Put together: treat all of this as provisional. 726 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 69.4% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 705 completed flights over 12 months sit behind that.
Related
Where to go next
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.