Flight number record

B6 891

JetBlue Airways · Boston to Tampa

Route: BOS → TPA
Departs: 06:00
Flights: 305
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 12 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 305 flights, with a median arrival 14 minutes early.

Set against the rest of the country, B6 891's record is 12 points better than the US average of 77.6%. That gap is worth roughly 123 fewer late arrivals for every thousand flights.

On time

89.9%

Arrivals under 15 minutes late, of 296 completed flights

Avg delay

76 min

Across delayed arrivals only, not all flights

Cancelled

2.30%

National rate is 1.81%

1 hour+ late

3.4%

National rate is 8.1%

These figures cover 305 flights between July 2025 and June 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.

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 159 of 305 flights, with 06:15 (34 flights) and 06:30 (33 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:00159 flights52.1%
Departs 06:1534 flights11.1%
Departs 06:3033 flights10.8%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

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 89.9%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

B6 891 next to BOS to TPA

Every carrier on BOS to TPA combined arrived on time 74.8% of the time across 2,822 flights, so B6 891 is 15 points ahead of it. JetBlue flew 1,576 flights on the same city pair under all its flight numbers, including this one, and those ran 74.1% on time. Across its whole network JetBlue Airways managed 72.7%, which this flight beats by 17 points.

B6 891 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 891thin sample	305	89.9%	76 min	2.30%	A
All JetBlue Airways on BOS–TPA	1,576	74.1%	67 min	2.86%	C
All carriers on BOS–TPA	2,822	74.8%	71 min	2.48%	C
JetBlue Airways, whole network	234,468	72.7%	76 min	2.56%	C

Across the year

B6 891 quarter by quarter

B6 891 did not run the same all year. Its best quarter was Jul–Sep 2025 at 91.9% on time and its weakest Jan–Mar 2026 at 81.4%, a swing of 11 points on roughly 76 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Jul–Sep 202575 flights91.9%
Oct–Dec 202591 flights90.9%
Jan–Mar 202648 flights81.4%
Apr–Jun 202691 flights91.2%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, B6 891 ranged from 84.1% on Thursday to 94.7% on Wednesday. With about 44 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why B6 891 runs late

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 2,285 reported delay minutes.

Late-arriving aircraft
34%
Carrier
33%
National Airspace System
29%
Extreme weather
4%

34% 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 2,285 reported delay minutes here, that single category outweighs weather by 9 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 2,285 delay minutes reported on B6 891.

Cancellations sit at 2.30% against a national 1.81%, which is ordinary. Diversions add another 0.66%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 3.4% land an hour or more behind schedule, against 8.1% 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. 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.

Every one of the 305 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. 305 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, read B6 891 as 89.9% on time with 2.30% cancelled over 305 flights. Those are rates from the past twelve months, not a forecast for any particular day.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures