Flight number record

B6 677

JetBlue Airways · New York to Jacksonville

Route: JFK → JAX
Departs: 13:45
Flights: 287
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s B6 677, check with JetBlue Airways.

B6 677 lands a B−, about a point worse than the national rate of 77.6%. About one flight in four arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 287 flights, with a median arrival 9 minutes early.

On time

76.8%

Arrivals under 15 minutes late, of 276 completed flights

Avg delay

59 min

Across delayed arrivals only, not all flights

Cancelled

3.83%

National rate is 1.81%

1 hour+ late

6.9%

National rate is 8.1%

These figures cover 287 flights between July 2025 and June 2026. The median arrival is 9 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 677 flies

B6 677 flies JFK to JAX without a single fixed slot. Its most common scheduled departure was 13:45, used on 53 of 287 flights, with 08:00 (39 flights) and 06:30 (36 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 13:4553 flights18.5%
Departs 08:0039 flights13.6%
Departs 06:3036 flights12.5%

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 13:45 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and B6 677 runs 2 points worse at 76.8%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

B6 677 next to JFK to JAX

Every carrier on JFK to JAX combined arrived on time 75.4% of the time across 1,186 flights, so B6 677 is about level with it. JetBlue flew 891 flights on the same city pair under all its flight numbers, including this one, and those ran 74.4% on time. Across its whole network JetBlue Airways managed 72.7%, which this flight beats by 4 points.

B6 677 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 677thin sample	287	76.8%	59 min	3.83%	B−
All JetBlue Airways on JFK–JAX	891	74.4%	73 min	3.59%	C−
All carriers on JFK–JAX	1,186	75.4%	79 min	3.29%	B−
JetBlue Airways, whole network	234,468	72.7%	76 min	2.56%	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 96 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%

Scale runs 50% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, B6 677 did best on Wednesday at 89.2% on time and worst on Sunday at 61.0%. Each day rests on about 41 flights, so a gap of 28 points is worth noticing but could still narrow in another year.

Delay causes

Why B6 677 runs late

One category carries most of the weight here. Carrier accounts for 51% of the 3,787 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.

Carrier
51%
National Airspace System
31%
Late-arriving aircraft
17%
Extreme weather
1%

The largest share of delay minutes, 51%, 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 1,932 of the 3,787 delay minutes reported here. The split is drawn from 3,787 delay minutes reported on B6 677.

Cancellations run at 3.83%, against 1.81% 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

6.9% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

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.

The same number turns up on one other city pair in the data, including JAX to JFK (64), 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. 287 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: 3.83% of its 287 scheduled flights did not operate. A late arrival costs about an hour, 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures