Flight number record
B6 1678
JetBlue Airways · Jacksonville to New York
- Route
- JAX → JFK
- 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 1678, check with JetBlue Airways.
B6 1678 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 15 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 35 minutes. That rests on 263 flights, with a median arrival 13 minutes early.
Set against the rest of the country, B6 1678's record is 15 points better than the US average of 77.3%. That gap is worth roughly 148 fewer late arrivals for every thousand flights.
Key figures
On time
92.1%
Arrivals under 15 minutes late, of 252 completed flights
Avg delay
36 min
Across delayed arrivals only, not all flights
Cancelled
4.18%
National rate is 1.89%
1 hour+ late
1.6%
National rate is 8.3%
These figures cover 263 flights between September 2025 and August 2026. The median arrival is 13 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 1678 flies
B6 1678 flies JAX to JFK without a single fixed slot. Its most common scheduled departure was 06:05, used on 79 of 263 flights, with 06:10 (44 flights) and 06:35 (35 flights) next.
- Departs 06:0579 flights30.0%
- Departs 06:1044 flights16.7%
- Departs 06:3535 flights13.3%
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 1678 runs 3 points better at 92.1%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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 1678 next to JAX to JFK
Every carrier on JAX to JFK combined arrived on time 74.2% of the time across 1,188 flights, so B6 1678 is 18 points ahead of it. JetBlue flew 891 flights on the same city pair under all its flight numbers, including this one, and those ran 77.2% on time. Across its whole network JetBlue Airways managed 71.3%, which this flight beats by 21 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| B6 1678thin sample | 263 | 92.1% | 36 min | 4.18% | A− |
| All JetBlue Airways on JAX–JFK | 891 | 77.2% | 72 min | 5.50% | B− |
| All carriers on JAX–JFK | 1,188 | 74.2% | 93 min | 5.05% | C− |
| JetBlue Airways, whole network | 240,615 | 71.3% | 77 min | 3.56% | C− |
Across the year
B6 1678 quarter by quarter
Quarter by quarter B6 1678 held fairly steady: 91.5% in Oct–Dec 2025, 94.7% in Apr–Jun 2026 and 87.5% 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 202524 flights—
- Oct–Dec 202575 flights91.5%
- Jan–Mar 202625 flights—
- Apr–Jun 202677 flights94.7%
- Jul–Sep 202662 flights87.5%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, B6 1678 did best on Friday at 97.4% on time and worst on Sunday at 83.8%. 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 1678 runs when it is late
B6 1678 often beats the schedule: 105 of 252 completed flights, 42%, arrived 15 minutes or more early. The 20 late arrivals split 9 under half an hour, 7 between 30 and 60 minutes, and 4 an hour or more. Not one arrived two hours late.
- 15+ min early105 flights41.7%
- Within 15 min127 flights50.4%
- 15–29 min late9 flights3.6%
- 30–59 min late7 flights2.8%
- 1–2 hours late4 flights1.6%
- 2+ hours late0 flights0.0%
Scale runs 0% to 100%.
Share of 252 completed flights by arrival against schedule.
Only 11 of 252 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for B6 1678
The latest arrival of the period was on 12 July 2026, 1 hour 31 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.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 12 July 2026 | 1 hour 31 minutes | Carrier |
| 18 June 2026 | 1 hour 13 minutes | Carrier |
| 16 December 2025 | 1 hour 7 minutes | Carrier |
| 3 August 2026 | 1 hour 1 minute | National Airspace System |
| 17 December 2025 | 47 minutes | National Airspace System |
Delay causes
Why B6 1678 runs late
Carrier accounts for 56% of the 718 delay minutes carriers reported here, and the remaining four split what is left.
- 56%Carrier
- 44%National Airspace System
The largest share of delay minutes, 56%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 403 of the 718 delay minutes reported here. The split is drawn from 718 delay minutes reported on B6 1678.
Cancellations run at 4.18%, against 1.89% nationally. That is about one flight in 25 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 1.6% 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.
The 829 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
Every one of the 263 flights under B6 1678 in the data flew JAX to JFK. 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 1678
For a booking, the cancellation rate is the figure to plan around on B6 1678: 4.18% of its 263 scheduled flights did not operate. A late arrival costs about 35 minutes, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- JAX to JFK, every carrier and departure
- JFK to JAX, the return direction
- JetBlue Airways 678 on the same route71.0%
- Jacksonville International (JAX) delay statistics
- John F. Kennedy International (JFK) 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
- What a cancellation rate actually tells you (and what it hides)
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.