Flight number record

B6 1434

JetBlue Airways · San Juan to Orlando

Route: SJU → MCO
Departs: 05:01
Flights: 257
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s B6 1434, check with JetBlue Airways.

B6 1434 lands a B+, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That is a workable record, not a spotless one. That rests on 257 flights, with a median arrival 10 minutes early.

On time

80.4%

Arrivals under 15 minutes late, of 255 completed flights

Avg delay

87 min

Across delayed arrivals only, not all flights

Cancelled

0.78%

National rate is 1.81%

1 hour+ late

10.2%

National rate is 8.1%

These figures cover 257 flights between July 2025 and June 2026. Beyond the headline rate, 10.2% 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.

Schedule

When B6 1434 flies

B6 1434 flies SJU to MCO without a single fixed slot. Its most common scheduled departure was 05:01, used on 92 of 257 flights, with 19:45 (31 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 05:0192 flights35.8%
Departs 19:4531 flights12.1%

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 05:01 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and B6 1434 runs 9 points worse at 80.4%. 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 1434 next to SJU to MCO

Every carrier on SJU to MCO combined arrived on time 78.9% of the time across 6,048 flights, so B6 1434 is 2 points ahead of it. JetBlue flew 2,130 flights on the same city pair under all its flight numbers, including this one, and those ran 76.9% on time. Across its whole network JetBlue Airways managed 72.7%, which this flight beats by 8 points.

B6 1434 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 1434thin sample	257	80.4%	87 min	0.78%	B+
All JetBlue Airways on SJU–MCO	2,130	76.9%	72 min	1.03%	B
All carriers on SJU–MCO	6,048	78.9%	79 min	1.01%	B
JetBlue Airways, whole network	234,468	72.7%	76 min	2.56%	C

Across the year

B6 1434 quarter by quarter

B6 1434 did not run the same all year. Its best quarter was Apr–Jun 2026 at 96.6% on time and its weakest Jan–Mar 2026 at 65.4%, a swing of 31 points on roughly 64 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 202552 flights96.2%
Oct–Dec 202566 flights71.2%
Jan–Mar 202680 flights65.4%
Apr–Jun 202659 flights96.6%

Scale runs 55% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, B6 1434 did best on Thursday at 94.6% on time and worst on Sunday at 68.4%. Each day rests on about 37 flights, so a gap of 26 points is worth noticing but could still narrow in another year.

Delay causes

Why B6 1434 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 60% of the 4,369 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
60%
Carrier
36%
National Airspace System
3%
Security
1%

60% 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 4,369 reported delay minutes here, that single category outweighs weather by 60 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 4,369 delay minutes reported on B6 1434.

Cancellations are rare at 0.78%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.2% 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 1,188 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 257 flights under B6 1434 in the data flew SJU to MCO. 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. 257 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 1434

For a booking, read B6 1434 as 80.4% on time with 0.78% cancelled over 257 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