Flight number record

B6 511

JetBlue Airways · New York to Las Vegas

Route: JFK → LAS
Departs: 11:00
Flights: 281
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s B6 511, check with JetBlue Airways.

B6 511 lands a B−, 6 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about 55 minutes on average. That rests on 281 flights, with a median arrival 11 minutes early.

Set against the rest of the country, B6 511's record is 6 points better than the US average of 77.3%. That gap is worth roughly 57 fewer late arrivals for every thousand flights.

On time

83.0%

Arrivals under 15 minutes late, of 270 completed flights

Avg delay

55 min

Across delayed arrivals only, not all flights

Cancelled

3.56%

National rate is 1.89%

1 hour+ late

4.4%

National rate is 8.3%

These figures cover 281 flights between September 2025 and August 2026. The median arrival is 11 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 511 flies

B6 511 flies JFK to LAS without a single fixed slot. Its most common scheduled departure was 11:00, used on 68 of 281 flights, with 09:50 (45 flights) and 08:29 (33 flights) next.

Departs 11:0068 flights24.2%
Departs 09:5045 flights16.0%
Departs 08:2933 flights11.7%

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 11:00 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and B6 511 runs 5 points better at 83.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

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Against the route

B6 511 next to JFK to LAS

Every carrier on JFK to LAS combined arrived on time 78.1% of the time across 3,721 flights, so B6 511 is 5 points ahead of it. JetBlue flew 1,382 flights on the same city pair under all its flight numbers, including this one, and those ran 80.6% on time. Across its whole network JetBlue Airways managed 71.3%, which this flight beats by 12 points.

B6 511 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 511thin sample	281	83.0%	55 min	3.56%	B−
All JetBlue Airways on JFK–LAS	1,382	80.6%	67 min	3.33%	B−
All carriers on JFK–LAS	3,721	78.1%	66 min	2.82%	B
JetBlue Airways, whole network	240,615	71.3%	77 min	3.56%	C−

Across the year

B6 511 quarter by quarter

Quarter by quarter B6 511 held fairly steady: 84.1% in Oct–Dec 2025, 81.8% in Jan–Mar 2026, 83.1% in Apr–Jun 2026 and 79.2% in Jul–Sep 2026. A spread of 5 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 202585 flights84.1%
Jan–Mar 202657 flights81.8%
Apr–Jun 202660 flights83.1%
Jul–Sep 202653 flights79.2%

Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, B6 511 did best on Wednesday at 91.9% on time and worst on Sunday at 70.7%. Each day rests on about 40 flights, so a gap of 21 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late B6 511 runs when it is late

B6 511 often beats the schedule: 115 of 270 completed flights, 43%, arrived 15 minutes or more early. The 46 late arrivals split 21 under half an hour, 13 between 30 and 60 minutes, and 12 an hour or more.

15+ min early115 flights42.6%
Within 15 min109 flights40.4%
15–29 min late21 flights7.8%
30–59 min late13 flights4.8%
1–2 hours late10 flights3.7%
2+ hours late2 flights0.7%

Scale runs 0% to 100%.

Share of 270 completed flights by arrival against schedule.

A late pushback is often recovered here: of 37 departures that left 15 minutes late or more, 17 still arrived on time. In the other direction, 26 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 LAS.

The worst days

Worst days for B6 511

The latest arrival of the period was on 14 December 2025, 6 hours 45 minutes behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across December, August, October and July, with no single month standing out.

The latest arrivals of B6 511 in the period
Date	Arrived late by	Largest filed cause
14 December 2025	6 hours 45 minutes	Extreme weather
21 August 2026	4 hours 27 minutes	Late-arriving aircraft
19 December 2025	1 hour 48 minutes	Carrier
14 October 2025	1 hour 34 minutes	National Airspace System
21 July 2026	1 hour 33 minutes	National Airspace System

Delay causes

Why B6 511 runs late

National Airspace System accounts for 47% of the 2,512 delay minutes carriers reported here, and the remaining four split what is left.

National Airspace System
47%
Carrier
23%
Late-arriving aircraft
15%
Extreme weather
14%

Extreme weather accounts for 14% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.3 times the usual weather exposure. The split is drawn from 2,512 delay minutes reported on B6 511.

Cancellations run at 3.56%, against 1.89% nationally. That is about one flight in 30 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 4.4% 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.

At 2,248 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.

Every one of the 281 flights under B6 511 in the data flew JFK to LAS. 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. 281 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 511

For a booking, the cancellation rate is the figure to plan around on B6 511: 3.56% of its 281 scheduled flights did not operate. A late arrival costs about 55 minutes, but a cancellation costs the day, so leave a later option open.

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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures