Flight number record

B6 615

JetBlue Airways · New York to San Francisco

Route: JFK → SFO
Departs: 15:45
Flights: 355
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s B6 615, check with JetBlue Airways.

B6 615 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 9 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 355 flights, with a median arrival 1 minute early.

The national on-time rate over the same period is 77.6%, so B6 615 runs 9 points behind the country as a whole. Across a thousand flights that is about 86 extra late arrivals.

On time

69.0%

Arrivals under 15 minutes late, of 348 completed flights

Avg delay

88 min

Across delayed arrivals only, not all flights

Cancelled

1.97%

National rate is 1.81%

1 hour+ late

15.2%

National rate is 8.1%

These figures cover 355 flights between July 2025 and June 2026. Beyond the headline rate, 15.2% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When B6 615 flies

B6 615 flies JFK to SFO without a single fixed slot. Its most common scheduled departure was 15:45, used on 64 of 355 flights, with 19:59 (47 flights) and 16:30 (44 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 15:4564 flights18.0%
Departs 19:5947 flights13.2%
Departs 16:3044 flights12.4%

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 15:45 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and B6 615 runs 3 points worse at 69.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

B6 615 next to JFK to SFO

Every carrier on JFK to SFO combined arrived on time 74.1% of the time across 6,730 flights, so B6 615 is 5 points behind it. JetBlue flew 1,945 flights on the same city pair under all its flight numbers, including this one, and those ran 76.7% on time. Across its whole network JetBlue Airways managed 72.7%, which this flight trails by 4 points.

B6 615 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 615thin sample	355	69.0%	88 min	1.97%	C
All JetBlue Airways on JFK–SFO	1,945	76.7%	75 min	2.01%	B
All carriers on JFK–SFO	6,730	74.1%	71 min	1.92%	C
JetBlue Airways, whole network	234,468	72.7%	76 min	2.56%	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 Apr–Jun 2026 at 52.4%, a swing of 32 points on roughly 89 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 202592 flights66.7%
Oct–Dec 202590 flights71.9%
Jan–Mar 202688 flights84.7%
Apr–Jun 202685 flights52.4%

Scale runs 45% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, B6 615 did best on Tuesday at 76.0% on time and worst on Sunday at 56.2%. Each day rests on about 51 flights, so a gap of 20 points is worth noticing but could still narrow in another year.

Delay causes

Why B6 615 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 43% of the 9,494 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
43%
National Airspace System
40%
Carrier
12%
Extreme weather
5%
Security
1%

43% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 9,494 reported delay minutes here, that single category outweighs weather by 8 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 9,494 delay minutes reported on B6 615.

Cancellations sit at 1.97% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 15.2% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum 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 355 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. 355 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, B6 615 is a flight to put a long connection behind. 15.2% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.

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