Flight number record

B6 123

JetBlue Airways · New York to Los Angeles

Route: JFK → LAX
Departs: 06:00
Flights: 309
Period: July 2025 to June 2026

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

B6 123 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 11 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 309 flights, with a median arrival 15 minutes early.

Set against the rest of the country, B6 123's record is 11 points better than the US average of 77.6%. That gap is worth roughly 105 fewer late arrivals for every thousand flights.

On time

88.1%

Arrivals under 15 minutes late, of 303 completed flights

Avg delay

68 min

Across delayed arrivals only, not all flights

Cancelled

1.62%

National rate is 1.81%

1 hour+ late

3.3%

National rate is 8.1%

These figures cover 309 flights between July 2025 and June 2026. The median arrival is 15 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 123 flies

B6 123 flies JFK to LAX without a single fixed slot. Its most common scheduled departure was 06:00, used on 200 of 309 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:00200 flights64.7%

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 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 level with that at 88.1%. 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 123 next to JFK to LAX

Every carrier on JFK to LAX combined arrived on time 77.6% of the time across 10,284 flights, so B6 123 is 11 points ahead of it. JetBlue flew 3,486 flights on the same city pair under all its flight numbers, including this one, and those ran 75.6% on time. Across its whole network JetBlue Airways managed 72.7%, which this flight beats by 15 points.

B6 123 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 123thin sample	309	88.1%	68 min	1.62%	A
All JetBlue Airways on JFK–LAX	3,486	75.6%	69 min	2.01%	B
All carriers on JFK–LAX	10,284	77.6%	77 min	1.94%	B
JetBlue Airways, whole network	234,468	72.7%	76 min	2.56%	C

Across the year

B6 123 quarter by quarter

B6 123 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.7% on time and its weakest Jan–Mar 2026 at 79.5%, a swing of 14 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 202579 flights93.7%
Oct–Dec 202572 flights92.9%
Jan–Mar 202677 flights79.5%
Apr–Jun 202681 flights86.4%

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 Tuesday at 80.8%. Each day rests on about 44 flights, so a gap of 15 points is worth noticing but could still narrow in another year.

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 2,444 reported delay minutes.

Late-arriving aircraft
33%
National Airspace System
31%
Carrier
26%
Extreme weather
9%

No single cause dominates. late-arriving aircraft at 33%, national airspace system at 31% and carrier at 26% split the 2,444 reported delay minutes between them. An even spread like this usually means the operation is running close to its designed capacity with no one obvious weak point, and it is the hardest pattern for a traveller to route around. The split is drawn from 2,444 delay minutes reported on B6 123.

Cancellations sit at 1.62% against a national 1.81%, which is ordinary. Diversions add another 0.32%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 3.3% 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 2,475 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, read B6 123 as 88.1% on time with 1.62% cancelled over 309 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