Flight number record
B6 615
JetBlue Airways · New York to San Francisco
- Route
- JFK → SFO
- Departs
- 18:30
- Flights
- 346
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s B6 615, check with JetBlue Airways.
B6 615 draws a C−. About one flight in three arrives at least 15 minutes late, and the typical late arrival is an hour and a half behind schedule. Build slack into anything you connect to. That rests on 346 flights, with a median arrival right on schedule.
The national on-time rate over the same period is 77.3%, so B6 615 runs 11 points behind the country as a whole. Across a thousand flights that is about 110 extra late arrivals.
Key figures
On time
66.3%
Arrivals under 15 minutes late, of 335 completed flights
Avg delay
88 min
Across delayed arrivals only, not all flights
Cancelled
3.18%
National rate is 1.89%
1 hour+ late
17.0%
National rate is 8.3%
These figures cover 346 flights between September 2025 and August 2026. Beyond the headline rate, 17.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When B6 615 flies
B6 615 flies JFK to SFO without a single fixed slot. Its most common scheduled departure was 18:30, used on 69 of 346 flights, with 15:45 (64 flights) and 16:30 (44 flights) next.
- Departs 18:3069 flights19.9%
- Departs 15:4564 flights18.5%
- Departs 16:3044 flights12.7%
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 18:30 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and B6 615 runs level with that at 66.3%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
B6 615 next to JFK to SFO
Every carrier on JFK to SFO combined arrived on time 71.4% of the time across 6,800 flights, so B6 615 is 5 points behind it. JetBlue flew 1,955 flights on the same city pair under all its flight numbers, including this one, and those ran 73.4% on time. Across its whole network JetBlue Airways managed 71.3%, which this flight trails by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| B6 615thin sample | 346 | 66.3% | 88 min | 3.18% | C− |
| All JetBlue Airways on JFK–SFO | 1,955 | 73.4% | 73 min | 2.86% | C |
| All carriers on JFK–SFO | 6,800 | 71.4% | 69 min | 2.57% | C |
| JetBlue Airways, whole network | 240,615 | 71.3% | 77 min | 3.56% | C− |
Across the year
B6 615 quarter by quarter
B6 615 did not run the same all year. Its best quarter was Jan–Mar 2026 at 84.7% on time and its weakest Jul–Sep 2026 at 38.3%, a swing of 46 points on roughly 69 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 flights80.0%
- Oct–Dec 202590 flights71.9%
- Jan–Mar 202688 flights84.7%
- Apr–Jun 202685 flights52.4%
- Jul–Sep 202653 flights38.3%
Scale runs 30% to 90%.
By weekday, B6 615 did best on Tuesday at 79.2% on time and worst on Friday at 58.8%. Each day rests on about 49 flights, so a gap of 20 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late B6 615 runs when it is late
B6 615 often beats the schedule: 92 of 335 completed flights, 27%, arrived 15 minutes or more early. When B6 615 is late it tends to be very late: 57 of its 113 late arrivals were an hour or more behind, and 29 were two hours or more.
- 15+ min early92 flights27.5%
- Within 15 min130 flights38.8%
- 15–29 min late31 flights9.3%
- 30–59 min late25 flights7.5%
- 1–2 hours late28 flights8.4%
- 2+ hours late29 flights8.7%
Scale runs 0% to 100%.
Share of 335 completed flights by arrival against schedule.
15 of 102 late departures made up the time and arrived on time, 15% of them. In the other direction, 26 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 SFO.
The worst days
Worst days for B6 615
The latest arrival of the period was on 24 February 2026, 7 hours 11 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as national airspace system delay.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 24 February 2026 | 7 hours 11 minutes | Late-arriving aircraft |
| 19 May 2026 | 6 hours 19 minutes | National Airspace System |
| 12 October 2025 | 6 hours | Late-arriving aircraft |
| 4 September 2025 | 5 hours 1 minute | National Airspace System |
| 3 January 2026 | 4 hours 54 minutes | National Airspace System |
Delay causes
Why B6 615 runs late
National Airspace System accounts for 45% of the 9,910 delay minutes carriers reported here, and the remaining four split what is left.
- 45%National Airspace System
- 39%Late-arriving aircraft
- 13%Carrier
- 2%Extreme weather
- 0%Security
39% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 9,910 reported delay minutes here, that single category outweighs weather by 18 to one. The split is drawn from 9,910 delay minutes reported on B6 615.
Cancellations run at 3.18%, against 1.89% nationally. That is about 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
17.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 2,586 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 346 flights under B6 615 in the data flew JFK to SFO. 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. 346 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 615
For a booking, the cancellation rate is the figure to plan around on B6 615: 3.18% of its 346 scheduled flights did not operate. A late arrival costs an hour and a half, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- JFK to SFO, every carrier and departure
- SFO to JFK, the return direction
- American Airlines 179 on the same route79.8%
- American Airlines 177 on the same route60.4%
- Delta Air Lines 668 on the same route71.8%
- Delta Air Lines 667 on the same route55.7%
- American Airlines 15 on the same route73.7%
- JetBlue Airways 115 on the same route80.9%
- John F. Kennedy International (JFK) delay statistics
- San Francisco International (SFO) 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.