Flight number record
B6 546
JetBlue Airways · Orlando to Islip
- Route
- MCO → ISP
- Departs
- 06:15
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s B6 546, check with JetBlue Airways.
B6 546 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 364 flights, with a median arrival 10 minutes early.
Set against the rest of the country, B6 546's record is 13 points better than the US average of 77.3%. That gap is worth roughly 132 fewer late arrivals for every thousand flights.
Key figures
On time
90.5%
Arrivals under 15 minutes late, of 357 completed flights
Avg delay
56 min
Across delayed arrivals only, not all flights
Cancelled
1.37%
National rate is 1.89%
1 hour+ late
2.8%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. The median arrival is 10 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 546 flies
B6 546 flies MCO to ISP without a single fixed slot. Its most common scheduled departure was 06:15, used on 53 of 364 flights, with 08:00 (52 flights) and 12:38 (47 flights) next.
- Departs 06:1553 flights14.6%
- Departs 08:0052 flights14.3%
- Departs 12:3847 flights12.9%
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 06:15 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and B6 546 runs level with that at 90.5%. 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 546 next to MCO to ISP
Every carrier on MCO to ISP combined arrived on time 76.2% of the time across 1,441 flights, so B6 546 is 14 points ahead of it. 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 546thin sample | 364 | 90.5% | 56 min | 1.37% | A |
| All JetBlue Airways on MCO–ISP | 416 | 86.3% | 69 min | 1.20% | A |
| All carriers on MCO–ISP | 1,441 | 76.2% | 57 min | 1.67% | B |
| JetBlue Airways, whole network | 240,615 | 71.3% | 77 min | 3.56% | C− |
Across the year
B6 546 quarter by quarter
Quarter by quarter B6 546 held fairly steady: 83.3% in Jul–Sep 2025, 92.2% in Oct–Dec 2025, 91.8% in Jan–Mar 2026, 90.0% in Apr–Jun 2026 and 90.3% in Jul–Sep 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights83.3%
- Oct–Dec 202592 flights92.2%
- Jan–Mar 202690 flights91.8%
- Apr–Jun 202690 flights90.0%
- Jul–Sep 202662 flights90.3%
Scale runs 75% to 100%.
By weekday, B6 546 did best on Friday at 94.1% on time and worst on Thursday at 80.8%. Each day rests on about 52 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late B6 546 runs when it is late
B6 546 often beats the schedule: 131 of 357 completed flights, 37%, arrived 15 minutes or more early. The 34 late arrivals split 15 under half an hour, 9 between 30 and 60 minutes, and 10 an hour or more.
- 15+ min early131 flights36.7%
- Within 15 min192 flights53.8%
- 15–29 min late15 flights4.2%
- 30–59 min late9 flights2.5%
- 1–2 hours late5 flights1.4%
- 2+ hours late5 flights1.4%
Scale runs 0% to 100%.
Share of 357 completed flights by arrival against schedule.
6 of 29 late departures made up the time and arrived on time, 21% of them. 11 flights left on time and still arrived late.
The worst days
Worst days for B6 546
The latest arrival of the period was on 18 February 2026, 3 hours 28 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 February 2026 | 3 hours 28 minutes | Late-arriving aircraft |
| 3 September 2025 | 2 hours 33 minutes | Carrier |
| 9 April 2026 | 2 hours 22 minutes | Carrier |
| 2 May 2026 | 2 hours 11 minutes | National Airspace System |
| 23 April 2026 | 2 hours | Carrier |
Delay causes
Why B6 546 runs late
Carrier accounts for 58% of the 1,906 delay minutes carriers reported here, and the remaining four split what is left.
- 58%Carrier
- 30%National Airspace System
- 11%Late-arriving aircraft
- 1%Extreme weather
The largest share of delay minutes, 58%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,100 of the 1,906 delay minutes reported here. The split is drawn from 1,906 delay minutes reported on B6 546.
Cancellations sit at 1.37% against a national 1.89%, which is ordinary. Diversions add another 0.55%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.8% 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 971 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 364 flights under B6 546 in the data flew MCO to ISP. 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. 364 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 546
For a booking, B6 546 has one of the better records a US domestic flight can show: 90.5% on time and 1.37% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- MCO to ISP, every carrier and departure
- ISP to MCO, the return direction
- Orlando International (MCO) 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
- The best time of day to fly, according to 7.05 million flight records
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.