Flight number record
B6 677
JetBlue Airways · New York to Jacksonville
- Route
- JFK → JAX
- Departs
- 13:59
- Flights
- 349
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s B6 677, check with JetBlue Airways.
B6 677 sits in the middle of the pack with a B−. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 349 flights, with a median arrival 5 minutes early.
Key figures
On time
75.5%
Arrivals under 15 minutes late, of 327 completed flights
Avg delay
76 min
Across delayed arrivals only, not all flights
Cancelled
6.30%
National rate is 1.89%
1 hour+ late
9.2%
National rate is 8.3%
These figures cover 349 flights between September 2025 and August 2026. Beyond the headline rate, 9.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When B6 677 flies
B6 677 flies JFK to JAX without a single fixed slot. Its most common scheduled departure was 13:59, used on 75 of 349 flights, with 13:45 (53 flights) and 08:00 (39 flights) next.
- Departs 13:5975 flights21.5%
- Departs 13:4553 flights15.2%
- Departs 08:0039 flights11.2%
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 13:59 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and B6 677 runs 3 points worse at 75.5%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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 677 next to JFK to JAX
Every carrier on JFK to JAX combined arrived on time 74.0% of the time across 1,187 flights, so B6 677 is 2 points ahead of it. JetBlue flew 891 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 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| B6 677thin sample | 349 | 75.5% | 76 min | 6.30% | B− |
| All JetBlue Airways on JFK–JAX | 891 | 73.4% | 73 min | 4.94% | C− |
| All carriers on JFK–JAX | 1,187 | 74.0% | 80 min | 4.63% | C− |
| JetBlue Airways, whole network | 240,615 | 71.3% | 77 min | 3.56% | C− |
Across the year
B6 677 quarter by quarter
B6 677 did not run the same all year. Its best quarter was Jan–Mar 2026 at 87.3% on time and its weakest Oct–Dec 2025 at 58.8%, a swing of 29 points on roughly 87 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 202528 flights—
- Oct–Dec 202584 flights58.8%
- Jan–Mar 202684 flights87.3%
- Apr–Jun 202691 flights86.7%
- Jul–Sep 202662 flights68.6%
Scale runs 50% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, B6 677 did best on Tuesday at 85.0% on time and worst on Sunday at 63.3%. Each day rests on about 50 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late B6 677 runs when it is late
B6 677 often beats the schedule: 107 of 327 completed flights, 33%, arrived 15 minutes or more early. The 80 late arrivals split 30 under half an hour, 20 between 30 and 60 minutes, and 30 an hour or more.
- 15+ min early107 flights32.7%
- Within 15 min140 flights42.8%
- 15–29 min late30 flights9.2%
- 30–59 min late20 flights6.1%
- 1–2 hours late12 flights3.7%
- 2+ hours late18 flights5.5%
Scale runs 0% to 100%.
Share of 327 completed flights by arrival against schedule.
9 of 61 late departures made up the time and arrived on time, 15% of them. In the other direction, 28 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 JAX.
The worst days
Worst days for B6 677
The latest arrival of the period was on 6 July 2026, 5 hours 12 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The five worst days are spread across July, August, November and December, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 6 July 2026 | 5 hours 12 minutes | National Airspace System |
| 16 August 2026 | 4 hours 54 minutes | Late-arriving aircraft |
| 29 November 2025 | 4 hours 37 minutes | Carrier |
| 6 August 2026 | 4 hours 25 minutes | Late-arriving aircraft |
| 20 December 2025 | 4 hours 15 minutes | Carrier |
Delay causes
Why B6 677 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 6,074 reported delay minutes.
- 37%Carrier
- 33%National Airspace System
- 28%Late-arriving aircraft
- 2%Extreme weather
The largest share of delay minutes, 37%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,226 of the 6,074 delay minutes reported here. The split is drawn from 6,074 delay minutes reported on B6 677.
Cancellations run at 6.30%, against 1.89% nationally. That is about one flight in fifteen 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
9.2% 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.
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.
The same number turns up on one other city pair in the data, including JAX to JFK (2), but none flew often enough under B6 677 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to JFK to JAX only.
One caution: this is a thin sample. 349 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 677
For a booking, the cancellation rate is the figure to plan around on B6 677: 6.30% of its 349 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- JFK to JAX, every carrier and departure
- JAX to JFK, the return direction
- John F. Kennedy International (JFK) delay statistics
- Jacksonville International (JAX) 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.