Flight number record

B6 619

JetBlue Airways · Boston to San Diego

Route: BOS → SAN
Departs: 07:00
Flights: 263
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s B6 619, check with JetBlue Airways.

B6 619 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 263 flights, with a median arrival 17 minutes early.

Set against the rest of the country, B6 619's record is 11 points better than the US average of 77.6%. That gap is worth roughly 112 fewer late arrivals for every thousand flights.

On time

88.8%

Arrivals under 15 minutes late, of 259 completed flights

Avg delay

61 min

Across delayed arrivals only, not all flights

Cancelled

1.14%

National rate is 1.81%

1 hour+ late

3.9%

National rate is 8.1%

These figures cover 263 flights between July 2025 and June 2026. The median arrival is 17 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 619 flies

B6 619 flies BOS to SAN without a single fixed slot. Its most common scheduled departure was 07:00, used on 55 of 263 flights, with 10:25 (33 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:0055 flights20.9%
Departs 10:2533 flights12.5%

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 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and B6 619 runs level with that at 88.8%. 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 619 next to BOS to SAN

Every carrier on BOS to SAN combined arrived on time 76.5% of the time across 1,818 flights, so B6 619 is 12 points ahead of it. JetBlue flew 919 flights on the same city pair under all its flight numbers, including this one, and those ran 84.9% on time. Across its whole network JetBlue Airways managed 72.7%, which this flight beats by 16 points.

B6 619 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 619thin sample	263	88.8%	61 min	1.14%	A
All JetBlue Airways on BOS–SAN	919	84.9%	64 min	1.20%	B
All carriers on BOS–SAN	1,818	76.5%	56 min	1.38%	B
JetBlue Airways, whole network	234,468	72.7%	76 min	2.56%	C

Across the year

B6 619 quarter by quarter

Quarter by quarter B6 619 held fairly steady: 92.7% in Jul–Sep 2025, 90.9% in Oct–Dec 2025, 87.8% in Jan–Mar 2026 and 85.3% in Apr–Jun 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202555 flights92.7%
Oct–Dec 202555 flights90.9%
Jan–Mar 202678 flights87.8%
Apr–Jun 202675 flights85.3%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, B6 619 did best on Thursday at 95.1% on time and worst on Friday at 81.4%. Each day rests on about 38 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Delay causes

Why B6 619 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 1,774 reported delay minutes.

Carrier
37%
Late-arriving aircraft
27%
National Airspace System
25%
Extreme weather
11%

The largest share of delay minutes, 37%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 663 of the 1,774 delay minutes reported here. The split is drawn from 1,774 delay minutes reported on B6 619.

Cancellations sit at 1.14% against a national 1.81%, which is ordinary. Diversions add another 0.38%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 3.9% 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 2,588 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 263 flights under B6 619 in the data flew BOS to SAN. 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. 263 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 619

For a booking, B6 619 has one of the better records a US domestic flight can show: 88.8% on time and 1.14% cancelled. That is a base rate, not a promise about any single 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