Flight number record
B6 891
JetBlue Airways · Boston to Tampa
- Route
- BOS → TPA
- Departs
- 06:00
- Flights
- 318
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s B6 891, check with JetBlue Airways.
B6 891 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 13 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 318 flights, with a median arrival 14 minutes early.
Set against the rest of the country, B6 891's record is 13 points better than the US average of 77.3%. That gap is worth roughly 130 fewer late arrivals for every thousand flights.
Key figures
On time
90.3%
Arrivals under 15 minutes late, of 309 completed flights
Avg delay
59 min
Across delayed arrivals only, not all flights
Cancelled
2.52%
National rate is 1.89%
1 hour+ late
3.6%
National rate is 8.3%
These figures cover 318 flights between September 2025 and August 2026. The median arrival is 14 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When B6 891 flies
B6 891 flies BOS to TPA without a single fixed slot. Its most common scheduled departure was 06:00, used on 127 of 318 flights, with 06:30 (37 flights) next.
- Departs 06:00127 flights39.9%
- Departs 06:3037 flights11.6%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and B6 891 runs level with that at 90.3%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
B6 891 next to BOS to TPA
Every carrier on BOS to TPA combined arrived on time 74.4% of the time across 2,780 flights, so B6 891 is 16 points ahead of it. JetBlue flew 1,588 flights on the same city pair under all its flight numbers, including this one, and those ran 73.1% on time. Across its whole network JetBlue Airways managed 71.3%, which this flight beats by 19 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| B6 891thin sample | 318 | 90.3% | 59 min | 2.52% | A |
| All JetBlue Airways on BOS–TPA | 1,588 | 73.1% | 68 min | 3.90% | C− |
| All carriers on BOS–TPA | 2,780 | 74.4% | 70 min | 3.13% | C− |
| JetBlue Airways, whole network | 240,615 | 71.3% | 77 min | 3.56% | C− |
Across the year
B6 891 quarter by quarter
Quarter by quarter B6 891 held fairly steady: 90.9% in Oct–Dec 2025, 81.4% in Jan–Mar 2026, 91.2% in Apr–Jun 2026 and 90.2% in Jul–Sep 2026. A spread of 10 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202526 flights—
- Oct–Dec 202591 flights90.9%
- Jan–Mar 202648 flights81.4%
- Apr–Jun 202691 flights91.2%
- Jul–Sep 202662 flights90.2%
Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, B6 891 did best on Wednesday at 97.6% on time and worst on Thursday at 81.8%. Each day rests on about 45 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late B6 891 runs when it is late
B6 891 often beats the schedule: 146 of 309 completed flights, 47%, arrived 15 minutes or more early. The 30 late arrivals split 9 under half an hour, 10 between 30 and 60 minutes, and 11 an hour or more.
- 15+ min early146 flights47.2%
- Within 15 min133 flights43.0%
- 15–29 min late9 flights2.9%
- 30–59 min late10 flights3.2%
- 1–2 hours late8 flights2.6%
- 2+ hours late3 flights1.0%
Scale runs 0% to 100%.
Share of 309 completed flights by arrival against schedule.
4 of 23 late departures made up the time and arrived on time, 17% of them. 11 flights left on time and still arrived late.
The worst days
Worst days for B6 891
The latest arrival of the period was on 5 December 2025, 4 hours 14 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in December 2025.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 5 December 2025 | 4 hours 14 minutes | Carrier |
| 29 December 2025 | 2 hours 31 minutes | Carrier |
| 23 July 2026 | 2 hours 7 minutes | Carrier |
| 30 November 2025 | 1 hour 35 minutes | Late-arriving aircraft |
| 27 December 2025 | 1 hour 25 minutes | National Airspace System |
Delay causes
Why B6 891 runs late
Carrier accounts for 52% of the 1,782 delay minutes carriers reported here, and the remaining four split what is left.
- 52%Carrier
- 33%National Airspace System
- 10%Late-arriving aircraft
- 5%Extreme weather
The largest share of delay minutes, 52%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 926 of the 1,782 delay minutes reported here. The split is drawn from 1,782 delay minutes reported on B6 891.
Cancellations run at 2.52%, 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 routes
What a delay on this flight costs
Badly late arrivals are rare here: only 3.6% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 1,185 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.
Every one of the 318 flights under B6 891 in the data flew BOS to TPA. 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. 318 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 891
For a booking, the cancellation rate is the figure to plan around on B6 891: 2.52% of its 318 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- BOS to TPA, every carrier and departure
- TPA to BOS, the return direction
- Delta Air Lines 1439 on the same route71.6%
- JetBlue Airways 391 on the same route59.1%
- JetBlue Airways 591 on the same route59.4%
- Delta Air Lines 2234 on the same route63.4%
- Boston Logan International (BOS) delay statistics
- Tampa International (TPA) delay statistics
- JetBlue Airways on-time record
- Every JetBlue Airways flight number with a record
- The most and least reliable flight numbers in the US
- What a cancellation rate actually tells you (and what it hides)
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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.