Carrier route record

B6BOS→AUS

JetBlue Airways · Boston to Austin

Flights: 364
Period: July 2025 to June 2026
Share of route: 22%
Carriers: 3

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

JetBlue on BOS to AUS sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 364 flights, with a median arrival 6 minutes early.

The national on-time rate over the same period is 77.6%, so JetBlue on BOS to AUS runs 5 points behind the country as a whole. Across a thousand flights that is about 51 extra late arrivals.

On time

72.5%

Arrivals under 15 minutes late, of 357 completed flights

Avg delay

61 min

Across delayed arrivals only, not all flights

Cancelled

1.10%

National rate is 1.81%

Whole route

72.2%

Every carrier on BOS to AUS, 1,634 flights

These figures cover 364 flights between July 2025 and June 2026. Beyond the headline rate, 10.1% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Carrier by carrier

JetBlue against every carrier on BOS to AUS

JetBlue flew 364 of the 1,634 flights on BOS to AUS, about 22% of it. Its 72.5% on time is about level with the route as a whole at 72.2%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Delta at 74.9% to Southwest at 62.5%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

On-time performance by carrier on BOS to AUS
Airline	Flights	On time	Avg delay	Cancelled	Grade
Delta Air Lines	988	74.9%	93 min	2.63%	C
JetBlue Airways (this page)thin sample	364	72.5%	61 min	1.10%	C
Southwest Airlinesthin sample	282	62.5%	54 min	0.71%	D+

Flight by flight

JetBlue flight numbers on BOS to AUS

B6 103912:5966.8% · 253 flights

Departure window

When JetBlue runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 26 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am61 flights83.3%
8am–11am105 flights84.6%
11am–2pm105 flights58.4%
2pm–5pm93 flights67.4%
5pm–8pm—
8pm–5am—

Scale runs 50% to 90%. Rows with fewer than 30 flights show a dash.

The weak window here is the middle of the day, not the evening: 11am–2pm runs 58.4% on time against 84.6% for 8am–11am. That shape usually means a departure bank rather than an accumulating delay, so the recovery later in the afternoon is real rather than noise. The 8am–11am window is the busiest, with 105 flights scheduled in it.

Across the year

JetBlue on BOS to AUS through the year

Darker means more delays. Figures are on-time percentages.October best, July worst

July is the worst month at 50.0% on time, 50 points below October, the best at 100.0%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. June was the busiest month here, with 50 flights.

Across the week, Tuesday is the strongest day at 81.6% on time and Friday the weakest at 64.8%. 17 points is a smaller lever than departure hour, but it is free.

Delay causes

Why JetBlue runs late on this route

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 5,951 reported delay minutes.

National Airspace System
36%
Carrier
33%
Late-arriving aircraft
30%
Extreme weather
1%
Security
0%

36% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 2,129 minutes out of 5,951, against a national NAS share of 21%. The split is drawn from 5,951 reported delay minutes.

The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 84.6% on time here.

Cancellations sit at 1.10% against a national 1.81%, which is ordinary. Diversions add another 0.82%.

Connections and stage length

What a delay here costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.1% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

At 1,698 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.

The return leg is a different operation and performs like one: it runs 58.9% on time across 364 flights, 14 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 14 points of difference.

One caution: this is a thin sample. 364 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 JetBlue on BOS to AUS

Put together: treat all of this as provisional. 364 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 72.5% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 357 completed flights over 12 months sit behind that.

Where to go next

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