Flight number record
B6 1678
JetBlue Airways · Jacksonville to New York
- Route
- JAX → JFK
- Departs
- 06:20
- Flights
- 263
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 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 13 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 40 minutes. That rests on 263 flights, with a median arrival 11 minutes early.
Set against the rest of the country, B6 1678's record is 13 points better than the US average of 77.6%. That gap is worth roughly 134 fewer late arrivals for every thousand flights.
Key figures
On time
91.0%
Arrivals under 15 minutes late, of 256 completed flights
Avg delay
39 min
Across delayed arrivals only, not all flights
Cancelled
2.66%
National rate is 1.81%
1 hour+ late
1.6%
National rate is 8.1%
These figures cover 263 flights between July 2025 and June 2026. The median arrival is 11 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.
Schedule
When B6 1678 flies
B6 1678 flies JAX to JFK without a single fixed slot. Its most common scheduled departure was 06:20, used on 61 of 263 flights, with 06:10 (48 flights) and 06:35 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 06:2061 flights23.2%
- Departs 06:1048 flights18.3%
- Departs 06:3535 flights13.3%
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 06:20 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 level with that at 91.0%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Against the route
B6 1678 next to JAX to JFK
Every carrier on JAX to JFK combined arrived on time 74.4% of the time across 1,187 flights, so B6 1678 is 17 points ahead of it. JetBlue flew 891 flights on the same city pair under all its flight numbers, including this one, and those ran 77.0% on time. Across its whole network JetBlue Airways managed 72.7%, which this flight beats by 18 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| B6 1678thin sample | 263 | 91.0% | 39 min | 2.66% | A |
| All JetBlue Airways on JAX–JFK | 891 | 77.0% | 70 min | 4.04% | B− |
| All carriers on JAX–JFK | 1,187 | 74.4% | 87 min | 3.79% | C− |
| JetBlue Airways, whole network | 234,468 | 72.7% | 76 min | 2.56% | C |
Across the year
B6 1678 quarter by quarter
Quarter by quarter B6 1678 held fairly steady: 88.1% in Jul–Sep 2025, 91.5% in Oct–Dec 2025 and 94.7% in Apr–Jun 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 202586 flights88.1%
- Oct–Dec 202575 flights91.5%
- Jan–Mar 202625 flights—
- Apr–Jun 202677 flights94.7%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, B6 1678 did best on Friday at 100.0% on time and worst on Thursday at 83.9%. Each day rests on about 38 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Delay causes
Why B6 1678 runs late
One category carries most of the weight here. Carrier accounts for 66% of the 893 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.
- 66%Carrier
- 25%National Airspace System
- 9%Late-arriving aircraft
The largest share of delay minutes, 66%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 593 of the 893 delay minutes reported here. The split is drawn from 893 delay minutes reported on B6 1678.
Cancellations run at 2.66%, against 1.81% nationally. That is about one flight in 40 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 8.1% 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
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: 2.66% of its 263 scheduled flights did not operate. A late arrival costs roughly 40 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 route74.4%
- 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.