Flight number record

B6 123

JetBlue Airways · New York to Los Angeles

Route: JFK → LAX
Departs: 06:00
Flights: 309
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s B6 123, check with JetBlue Airways.

B6 123 earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 10 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 309 flights, with a median arrival 12 minutes early.

Set against the rest of the country, B6 123's record is 10 points better than the US average of 77.3%. That gap is worth roughly 96 fewer late arrivals for every thousand flights.

On time

86.9%

Arrivals under 15 minutes late, of 298 completed flights

Avg delay

62 min

Across delayed arrivals only, not all flights

Cancelled

2.91%

National rate is 1.89%

1 hour+ late

3.7%

National rate is 8.3%

These figures cover 309 flights between September 2025 and August 2026. The median arrival is 12 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 123 flies

B6 123 flies JFK to LAX without a single fixed slot. Its most common scheduled departure was 06:00, used on 197 of 309 flights.

Departs 06:00197 flights63.8%

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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and B6 123 runs 2 points worse at 86.9%. 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 123 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 123 is 12 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 16 points.

B6 123 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 123thin sample	309	86.9%	62 min	2.91%	A
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 123 quarter by quarter

B6 123 did not run the same all year. Its best quarter was Oct–Dec 2025 at 92.9% on time and its weakest Jan–Mar 2026 at 79.5%, a swing of 13 points on roughly 77 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 202526 flights—
Oct–Dec 202572 flights92.9%
Jan–Mar 202677 flights79.5%
Apr–Jun 202681 flights86.4%
Jul–Sep 202653 flights85.4%

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, B6 123 did best on Friday at 96.0% on time and worst on Sunday at 77.3%. Each day rests on about 44 flights, so a gap of 19 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late B6 123 runs when it is late

B6 123 often beats the schedule: 132 of 298 completed flights, 44%, arrived 15 minutes or more early. The 39 late arrivals split 16 under half an hour, 12 between 30 and 60 minutes, and 11 an hour or more.

15+ min early132 flights44.3%
Within 15 min127 flights42.6%
15–29 min late16 flights5.4%
30–59 min late12 flights4.0%
1–2 hours late6 flights2.0%
2+ hours late5 flights1.7%

Scale runs 0% to 100%.

Share of 298 completed flights by arrival against schedule.

6 of 25 late departures made up the time and arrived on time, 24% of them. In the other direction, 20 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 123

The latest arrival of the period was on 15 January 2026, 5 hours 43 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in January 2026.

The latest arrivals of B6 123 in the period
Date	Arrived late by	Largest filed cause
15 January 2026	5 hours 43 minutes	Late-arriving aircraft
18 January 2026	4 hours 12 minutes	Late-arriving aircraft
23 July 2026	3 hours 30 minutes	Carrier
27 January 2026	2 hours 5 minutes	Extreme weather
13 July 2026	2 hours	Late-arriving aircraft

Delay causes

Why B6 123 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 2,398 reported delay minutes.

National Airspace System
38%
Late-arriving aircraft
27%
Carrier
25%
Extreme weather
9%

38% 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 912 minutes out of 2,398, against a national NAS share of 21%. The split is drawn from 2,398 delay minutes reported on B6 123.

Cancellations run at 2.91%, against 1.89% nationally. That is roughly 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 3.7% 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 2,475 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 309 flights under B6 123 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. 309 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 123

For a booking, the cancellation rate is the figure to plan around on B6 123: 2.91% of its 309 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