Flight number record

B6 523

JetBlue Airways · New York to Los Angeles

Route: JFK → LAX
Departs: 09:20
Flights: 317
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s B6 523, check with JetBlue Airways.

B6 523 lands a B−, 4 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 317 flights, with a median arrival 8 minutes early.

Set against the rest of the country, B6 523's record is 4 points better than the US average of 77.3%. That gap is worth roughly 40 fewer late arrivals for every thousand flights.

On time

81.3%

Arrivals under 15 minutes late, of 305 completed flights

Avg delay

61 min

Across delayed arrivals only, not all flights

Cancelled

3.79%

National rate is 1.89%

1 hour+ late

5.6%

National rate is 8.3%

These figures cover 317 flights between September 2025 and August 2026. The median arrival is 8 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 523 flies

B6 523 flies JFK to LAX without a single fixed slot. Its most common scheduled departure was 09:20, used on 45 of 317 flights, with 07:30 (35 flights) next.

Departs 09:2045 flights14.2%
Departs 07:3035 flights11.0%

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 09:20 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and B6 523 runs 3 points worse at 81.3%. 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 523 next to JFK to LAX

Every carrier on JFK to LAX combined arrived on time 75.4% of the time across 10,285 flights, so B6 523 is 6 points ahead of it. JetBlue flew 3,480 flights on the same city pair under all its flight numbers, including this one, and those ran 72.5% on time. Across its whole network JetBlue Airways managed 71.3%, which this flight beats by 10 points.

B6 523 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 523thin sample	317	81.3%	61 min	3.79%	B−
All JetBlue Airways on JFK–LAX	3,480	72.5%	73 min	3.19%	C−
All carriers on JFK–LAX	10,285	75.4%	78 min	2.78%	B
JetBlue Airways, whole network	240,615	71.3%	77 min	3.56%	C−

Across the year

B6 523 quarter by quarter

B6 523 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Jul–Sep 2026 at 71.2%, a swing of 22 points on roughly 63 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 202530 flights93.3%
Oct–Dec 202592 flights81.2%
Jan–Mar 202651 flights77.6%
Apr–Jun 202682 flights86.6%
Jul–Sep 202662 flights71.2%

Scale runs 65% to 100%.

By weekday, B6 523 did best on Tuesday at 88.1% on time and worst on Sunday at 76.1%. Each day rests on about 45 flights, so a gap of 12 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late B6 523 runs when it is late

B6 523 often beats the schedule: 110 of 305 completed flights, 36%, arrived 15 minutes or more early. The 57 late arrivals split 21 under half an hour, 19 between 30 and 60 minutes, and 17 an hour or more.

15+ min early110 flights36.1%
Within 15 min138 flights45.2%
15–29 min late21 flights6.9%
30–59 min late19 flights6.2%
1–2 hours late11 flights3.6%
2+ hours late6 flights2.0%

Scale runs 0% to 100%.

Share of 305 completed flights by arrival against schedule.

A late pushback is often recovered here: of 38 departures that left 15 minutes late or more, 14 still arrived on time. In the other direction, 33 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 LAX.

The worst days

Worst days for B6 523

The latest arrival of the period was on 4 July 2026, 12 hours 37 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.

The latest arrivals of B6 523 in the period
Date	Arrived late by	Largest filed cause
4 July 2026	12 hours 37 minutes	Carrier
1 January 2026	3 hours 53 minutes	Carrier
12 December 2025	2 hours 40 minutes	Carrier
24 May 2026	2 hours 16 minutes	Carrier
23 August 2026	2 hours 6 minutes	National Airspace System

Delay causes

Why B6 523 runs late

Carrier accounts for 43% of the 3,488 delay minutes carriers reported here, and the remaining four split what is left.

Carrier
43%
National Airspace System
40%
Late-arriving aircraft
18%
Extreme weather
0%

40% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 1,385 minutes out of 3,488, against a national NAS share of 21%. The split is drawn from 3,488 delay minutes reported on B6 523.

Cancellations run at 3.79%, against 1.89% nationally. That is about one flight in 25 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

5.6% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

At 2,475 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 317 flights under B6 523 in the data flew JFK to LAX. 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. 317 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 523

For a booking, the cancellation rate is the figure to plan around on B6 523: 3.79% of its 317 scheduled flights did not operate. A late arrival costs about an hour, 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