Flight number record

B6 249

JetBlue Airways · Boston to Savannah

Route: BOS → SAV
Departs: 10:05
Flights: 349
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s B6 249, check with JetBlue Airways.

B6 249 lands a B, 5 points better than the national rate of 77.6%. About one flight in six 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 349 flights, with a median arrival 9 minutes early.

Set against the rest of the country, B6 249's record is 5 points better than the US average of 77.6%. That gap is worth roughly 50 fewer late arrivals for every thousand flights.

On time

82.6%

Arrivals under 15 minutes late, of 340 completed flights

Avg delay

66 min

Across delayed arrivals only, not all flights

Cancelled

2.29%

National rate is 1.81%

1 hour+ late

6.2%

National rate is 8.1%

These figures cover 349 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 249 flies

B6 249 flies BOS to SAV without a single fixed slot. Its most common scheduled departure was 10:05, used on 72 of 349 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 10:0572 flights20.6%

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 10:05 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and B6 249 runs level with that at 82.6%. 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 249 next to BOS to SAV

Every carrier on BOS to SAV combined arrived on time 80.0% of the time across 1,076 flights, so B6 249 is 3 points ahead of it. JetBlue flew 616 flights on the same city pair under all its flight numbers, including this one, and those ran 78.6% on time. Across its whole network JetBlue Airways managed 72.7%, which this flight beats by 10 points.

B6 249 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 249thin sample	349	82.6%	66 min	2.29%	B
All JetBlue Airways on BOS–SAV	616	78.6%	65 min	2.27%	B
All carriers on BOS–SAV	1,076	80.0%	57 min	1.86%	B
JetBlue Airways, whole network	234,468	72.7%	76 min	2.56%	C

Across the year

B6 249 quarter by quarter

B6 249 did not run the same all year. Its best quarter was Apr–Jun 2026 at 90.7% on time and its weakest Oct–Dec 2025 at 78.9%, a swing of 12 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 202584 flights81.9%
Oct–Dec 202592 flights78.9%
Jan–Mar 202686 flights79.0%
Apr–Jun 202687 flights90.7%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, B6 249 did best on Wednesday at 88.9% on time and worst on Sunday at 76.5%. Each day rests on about 50 flights, so a gap of 12 points is worth noticing but could still narrow in another year.

Delay causes

Why B6 249 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 3,899 reported delay minutes.

Carrier
40%
National Airspace System
27%
Late-arriving aircraft
21%
Extreme weather
12%

Extreme weather accounts for 12% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 1.9 times the usual weather exposure. The split is drawn from 3,899 delay minutes reported on B6 249.

Cancellations sit at 2.29% against a national 1.81%, which is ordinary. Diversions add another 0.29%.

Connections and routes

What a delay on this flight costs

6.2% 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 901 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 349 flights under B6 249 in the data flew BOS to SAV. 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. 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 249

For a booking, read B6 249 as 82.6% on time with 2.29% cancelled over 349 flights. Those are rates from the past twelve months, not a forecast for any particular day.

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