Flight number record

B6 511

JetBlue Airways · New York to Las Vegas

Route: JFK → LAS
Departs: 09:30
Flights: 281
Period: July 2025 to June 2026

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

B6 511 earns a B. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 45 minutes. That rests on 281 flights, with a median arrival 11 minutes early.

Set against the rest of the country, B6 511's record is 7 points better than the US average of 77.6%. That gap is worth roughly 68 fewer late arrivals for every thousand flights.

On time

84.4%

Arrivals under 15 minutes late, of 275 completed flights

Avg delay

47 min

Across delayed arrivals only, not all flights

Cancelled

1.78%

National rate is 1.81%

1 hour+ late

2.5%

National rate is 8.1%

These figures cover 281 flights between July 2025 and June 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.

Schedule

When B6 511 flies

B6 511 flies JFK to LAS without a single fixed slot. Its most common scheduled departure was 09:30, used on 51 of 281 flights, with 09:50 (45 flights) and 08:29 (33 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 09:3051 flights18.1%
Departs 09:5045 flights16.0%
Departs 08:2933 flights11.7%

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 09:30 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and B6 511 runs level with that at 84.4%. 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 511 next to JFK to LAS

Every carrier on JFK to LAS combined arrived on time 79.9% of the time across 3,714 flights, so B6 511 is 5 points ahead of it. JetBlue flew 1,375 flights on the same city pair under all its flight numbers, including this one, and those ran 82.4% on time. Across its whole network JetBlue Airways managed 72.7%, 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	84.4%	47 min	1.78%	B
All JetBlue Airways on JFK–LAS	1,375	82.4%	65 min	2.25%	B
All carriers on JFK–LAS	3,714	79.9%	64 min	2.18%	B
JetBlue Airways, whole network	234,468	72.7%	76 min	2.56%	C

Across the year

B6 511 quarter by quarter

Quarter by quarter B6 511 held fairly steady: 87.3% in Jul–Sep 2025, 84.1% in Oct–Dec 2025, 81.8% in Jan–Mar 2026 and 83.1% in Apr–Jun 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202579 flights87.3%
Oct–Dec 202585 flights84.1%
Jan–Mar 202657 flights81.8%
Apr–Jun 202660 flights83.1%

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

By weekday, B6 511 did best on Thursday at 90.9% on time and worst on Sunday at 72.1%. Each day rests on about 40 flights, so a gap of 19 points is worth noticing but could still narrow in another year.

Delay causes

Why B6 511 runs late

One category carries most of the weight here. National Airspace System accounts for 51% of the 2,000 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.

National Airspace System
51%
Carrier
27%
Extreme weather
17%
Late-arriving aircraft
5%

Extreme weather accounts for 17% 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 2.8 times the usual weather exposure. The split is drawn from 2,000 delay minutes reported on B6 511.

Cancellations sit at 1.78% against a national 1.81%, which is ordinary. Diversions add another 0.36%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 2.5% 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.

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, read B6 511 as 84.4% on time with 1.78% cancelled over 281 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