Carrier route record

B6AUS→BOS

JetBlue Airways · Austin to Boston

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 AUS to BOS draws a D. Roughly one flight in two arrives at least 15 minutes late, and the typical late arrival is an hour and a half behind schedule. Build slack into anything you connect to. That rests on 364 flights, with a median arrival 7 minutes late.

The national on-time rate over the same period is 77.6%, so JetBlue on AUS to BOS runs 19 points behind the country as a whole. Across a thousand flights that is about 187 extra late arrivals.

On time

58.9%

Arrivals under 15 minutes late, of 358 completed flights

Avg delay

84 min

Across delayed arrivals only, not all flights

Cancelled

1.65%

National rate is 1.81%

Whole route

65.4%

Every carrier on AUS to BOS, 1,634 flights

These figures cover 364 flights between July 2025 and June 2026. Beyond the headline rate, 19.3% 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 AUS to BOS

JetBlue flew 364 of the 1,634 flights on AUS to BOS, about 22% of it. Its 58.9% on time is 7 points worse than the route as a whole, which runs 65.4%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Delta at 70.9% to Southwest at 54.7%. 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 AUS to BOS
Airline	Flights	On time	Avg delay	Cancelled	Grade
Delta Air Lines	988	70.9%	91 min	2.73%	C
JetBlue Airways (this page)thin sample	364	58.9%	84 min	1.65%	D
Southwest Airlinesthin sample	282	54.7%	54 min	1.77%	F

Flight by flight

JetBlue flight numbers on AUS to BOS

B6 113817:1058.3% · 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 16 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–8am—
8am–11am20 flights—
11am–2pm124 flights48.4%
2pm–5pm23 flights—
5pm–8pm196 flights64.6%
8pm–5am1 flights—

Scale runs 40% to 70%. 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 48.4% on time against 64.6% for 5pm–8pm. 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 5pm–8pm window is the busiest, with 196 flights scheduled in it.

Across the year

JetBlue on AUS to BOS through the year

Darker means more delays. Figures are on-time percentages.August best, December worst

December is the weak month at 38.7% on time, against 80.6% in August. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. June was the busiest month here, with 50 flights.

Across the week, Saturday is the strongest day at 73.9% on time and Friday the weakest at 44.4%. 30 points is a smaller lever than departure hour, but it is free.

Delay causes

Why JetBlue runs late on this route

One category carries most of the weight here. Late-arriving aircraft accounts for 45% of the 12,000 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.

Late-arriving aircraft
45%
National Airspace System
35%
Carrier
20%
Security
0%
Extreme weather
0%

45% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 12,000 reported delay minutes here, that single category outweighs weather by 45 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 12,320 reported delay minutes.

35% 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 4,294 minutes out of 12,000, against a national NAS share of 21%.

Cancellations sit at 1.65% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

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. 19.3% 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 72.5% on time across 364 flights, 14 points above 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 AUS to BOS

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 58.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 358 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