Flight number record

B6 15

JetBlue Airways · New York to San Francisco

Route: JFK → SFO
Departs: 08:00
Flights: 258
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s B6 15, check with JetBlue Airways.

B6 15 earns a B−. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 50 minutes. That rests on 258 flights, with a median arrival 8 minutes early.

Set against the rest of the country, B6 15's record is 7 points better than the US average of 77.3%. That gap is worth roughly 67 fewer late arrivals for every thousand flights.

On time

84.0%

Arrivals under 15 minutes late, of 250 completed flights

Avg delay

49 min

Across delayed arrivals only, not all flights

Cancelled

3.10%

National rate is 1.89%

1 hour+ late

4.4%

National rate is 8.3%

These figures cover 258 flights between September 2025 and August 2026. The median arrival is 8 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 15 flies

B6 15 flies JFK to SFO without a single fixed slot. Its most common scheduled departure was 08:00, used on 72 of 258 flights, with 06:00 (36 flights) and 06:50 (34 flights) next.

Departs 08:0072 flights27.9%
Departs 06:0036 flights14.0%
Departs 06:5034 flights13.2%

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 08:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and B6 15 runs level with that at 84.0%. 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 15 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 15 is 13 points ahead of 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 beats by 13 points.

B6 15 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 15thin sample	258	84.0%	49 min	3.10%	B−
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 15 quarter by quarter

B6 15 did not run the same all year. Its best quarter was Jan–Mar 2026 at 86.8% on time and its weakest Jul–Sep 2026 at 75.0%, a swing of 12 points on roughly 65 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.

Oct–Dec 202546 flights86.4%
Jan–Mar 202673 flights86.8%
Apr–Jun 202686 flights86.0%
Jul–Sep 202653 flights75.0%

Scale runs 65% to 90%.

By weekday, B6 15 ranged from 80.0% on Monday to 89.7% on Friday. With about 37 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.

Arrival by arrival

How late B6 15 runs when it is late

B6 15 often beats the schedule: 95 of 250 completed flights, 38%, arrived 15 minutes or more early. The 40 late arrivals split 16 under half an hour, 13 between 30 and 60 minutes, and 11 an hour or more.

15+ min early95 flights38.0%
Within 15 min115 flights46.0%
15–29 min late16 flights6.4%
30–59 min late13 flights5.2%
1–2 hours late9 flights3.6%
2+ hours late2 flights0.8%

Scale runs 0% to 100%.

Share of 250 completed flights by arrival against schedule.

5 of 26 late departures made up the time and arrived on time, 19% of them. In the other direction, 19 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 15

The latest arrival of the period was on 31 October 2025, 3 hours 30 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.

The latest arrivals of B6 15 in the period
Date	Arrived late by	Largest filed cause
31 October 2025	3 hours 30 minutes	Carrier
16 August 2026	2 hours 22 minutes	Carrier
17 December 2025	1 hour 56 minutes	Carrier
7 June 2026	1 hour 44 minutes	Late-arriving aircraft
25 January 2026	1 hour 38 minutes	National Airspace System

Delay causes

Why B6 15 runs late

National Airspace System accounts for 51% of the 1,939 delay minutes carriers reported here, and the remaining four split what is left.

National Airspace System
51%
Carrier
33%
Late-arriving aircraft
16%
Extreme weather
1%

51% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 982 minutes out of 1,939, against a national NAS share of 21%. The split is drawn from 1,939 delay minutes reported on B6 15.

Cancellations run at 3.10%, 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

Badly late arrivals are rare here: only 4.4% land an hour or more behind schedule, against 8.3% 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 2,586 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 258 flights under B6 15 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. 258 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 15

For a booking, the cancellation rate is the figure to plan around on B6 15: 3.10% of its 258 scheduled flights did not operate. A late arrival costs roughly 50 minutes, but a cancellation costs the day, so leave a later option open.

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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures