Flight number record
B6 619
JetBlue Airways · Boston to San Diego
- Route
- BOS → SAN
- Departs
- 06:05
- Flights
- 263
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 10 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 263 flights, with a median arrival 16 minutes early.
Set against the rest of the country, B6 619's record is 10 points better than the US average of 77.3%. That gap is worth roughly 99 fewer late arrivals for every thousand flights.
Key figures
On time
87.2%
Arrivals under 15 minutes late, of 257 completed flights
Avg delay
82 min
Across delayed arrivals only, not all flights
Cancelled
1.90%
National rate is 1.89%
1 hour+ late
5.8%
National rate is 8.3%
These figures cover 263 flights between September 2025 and August 2026. The median arrival is 16 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 619 flies
B6 619 flies BOS to SAN without a single fixed slot. Its most common scheduled departure was 06:05, used on 67 of 263 flights, with 10:25 (33 flights) next.
- Departs 06:0567 flights25.5%
- Departs 10:2533 flights12.5%
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 06:05 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 2 points worse at 87.2%. 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 619 next to BOS to SAN
Every carrier on BOS to SAN combined arrived on time 75.3% of the time across 1,880 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 82.4% on time. Across its whole network JetBlue Airways managed 71.3%, which this flight beats by 16 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| B6 619thin sample | 263 | 87.2% | 82 min | 1.90% | A |
| All JetBlue Airways on BOS–SAN | 919 | 82.4% | 69 min | 1.96% | B |
| All carriers on BOS–SAN | 1,880 | 75.3% | 62 min | 1.81% | B |
| JetBlue Airways, whole network | 240,615 | 71.3% | 77 min | 3.56% | C− |
Across the year
B6 619 quarter by quarter
Quarter by quarter B6 619 held fairly steady: 90.9% in Oct–Dec 2025, 87.8% in Jan–Mar 2026, 85.3% in Apr–Jun 2026 and 84.3% in Jul–Sep 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 20252 flights—
- Oct–Dec 202555 flights90.9%
- Jan–Mar 202678 flights87.8%
- Apr–Jun 202675 flights85.3%
- Jul–Sep 202653 flights84.3%
Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, B6 619 did best on Thursday at 92.7% on time and worst on Friday at 79.1%. Each day rests on about 38 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late B6 619 runs when it is late
B6 619 often beats the schedule: 143 of 257 completed flights, 56%, arrived 15 minutes or more early. The 33 late arrivals split 12 under half an hour, 6 between 30 and 60 minutes, and 15 an hour or more.
- 15+ min early143 flights55.6%
- Within 15 min81 flights31.5%
- 15–29 min late12 flights4.7%
- 30–59 min late6 flights2.3%
- 1–2 hours late11 flights4.3%
- 2+ hours late4 flights1.6%
Scale runs 0% to 100%.
Share of 257 completed flights by arrival against schedule.
A late pushback is often recovered here: of 39 departures that left 15 minutes late or more, 16 still arrived on time. 10 flights left on time and still arrived late.
The worst days
Worst days for B6 619
The latest arrival of the period was on 3 August 2026, 10 hours 56 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across August, April, January, March and November, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 3 August 2026 | 10 hours 56 minutes | Late-arriving aircraft |
| 17 April 2026 | 5 hours 26 minutes | Late-arriving aircraft |
| 19 January 2026 | 2 hours 24 minutes | Extreme weather |
| 6 March 2026 | 2 hours 15 minutes | Extreme weather |
| 14 November 2025 | 1 hour 56 minutes | Carrier |
Delay causes
Why B6 619 runs late
Late-arriving aircraft accounts for 47% of the 2,695 delay minutes carriers reported here, and the remaining four split what is left.
- 47%Late-arriving aircraft
- 29%Carrier
- 17%National Airspace System
- 7%Extreme weather
47% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,695 reported delay minutes here, that single category outweighs weather by 7 to one. The split is drawn from 2,695 delay minutes reported on B6 619.
Cancellations sit at 1.90% against a national 1.89%, which is ordinary. Diversions add another 0.38%.
Connections and routes
What a delay on this flight costs
5.8% 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 a little over an hour, which a normal layover absorbs.
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, read B6 619 as 87.2% on time with 1.90% cancelled over 263 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- BOS to SAN, every carrier and departure
- SAN to BOS, the return direction
- Delta Air Lines 571 on the same route66.0%
- Alaska Airlines 389 on the same route69.5%
- Boston Logan International (BOS) delay statistics
- San Diego International (SAN) delay statistics
- JetBlue Airways on-time record
- Every JetBlue Airways flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
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 ; recomputed monthly. How this data is collected.