Carrier route record

B6BOS→AUS

JetBlue Airways · Boston to Austin

Flights: 426
Period: September 2025 to August 2026
Share of route: 25%
Carriers: 3

Historical statistics for September 2025 to August 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. 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 about an hour behind schedule. That rests on 426 flights, with a median arrival 10 minutes early.

The US average over the same twelve months is 77.3%, so there is little to separate JetBlue on BOS to AUS from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

74.9%

Arrivals under 15 minutes late, of 411 completed flights

Avg delay

61 min

Across delayed arrivals only, not all flights

Cancelled

2.58%

National rate is 1.89%

Whole route

72.6%

Every carrier on BOS to AUS, 1,713 flights

These figures cover 426 flights between September 2025 and August 2026. Beyond the headline rate, 9.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

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Carrier by carrier

JetBlue against every carrier on BOS to AUS

JetBlue flew 426 of the 1,713 flights on BOS to AUS, about 25% of it. Its 74.9% on time is 2 points better than the route as a whole, which runs 72.6%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from JetBlue at 74.9% to Southwest at 65.6%. 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
JetBlue Airways (this page)	426	74.9%	61 min	2.58%	C
Delta Air Lines	1,001	73.7%	87 min	2.60%	C
Southwest Airlinesthin sample	286	65.6%	52 min	1.40%	C

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.

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.

5am–8am123 flights86.8%
8am–11am105 flights84.6%
11am–2pm87 flights60.7%
2pm–5pm111 flights64.2%
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 60.7% on time against 86.8% for 5am–8am. 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 5am–8am window is the busiest, with 123 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, December worst

December is the weak month at 67.7% on time, against 100.0% in October. 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. July was the busiest month here, with 62 flights.

Across the week, Wednesday is the strongest day at 85.2% on time and Friday the weakest at 63.5%, a spread of 22 points.

Arrival by arrival

How late JetBlue on BOS to AUS runs when it is late

JetBlue on BOS to AUS often beats the schedule: 163 of 411 completed flights, 40%, arrived 15 minutes or more early. The 103 late arrivals split 28 under half an hour, 36 between 30 and 60 minutes, and 39 an hour or more.

15+ min early163 flights39.7%
Within 15 min145 flights35.3%
15–29 min late28 flights6.8%
30–59 min late36 flights8.8%
1–2 hours late27 flights6.6%
2+ hours late12 flights2.9%

Scale runs 0% to 100%.

Share of 411 completed flights by arrival against schedule.

27 of 95 late departures made up the time and arrived on time, 28% of them. In the other direction, 35 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 AUS.

The worst days

Worst days for JetBlue on BOS to AUS

The latest arrival of the period was on 21 November 2025, 5 hours 9 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.

The latest arrivals of JetBlue on BOS to AUS in the period
Date	Arrived late by	Largest filed cause
21 November 2025	5 hours 9 minutes	Carrier
9 May 2026	3 hours 13 minutes	Carrier
1 May 2026	3 hours 5 minutes	Late-arriving aircraft
6 December 2025	3 hours 4 minutes	Carrier
1 February 2026	2 hours 38 minutes	Late-arriving aircraft

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 6,294 reported delay minutes.

National Airspace System
35%
Carrier
33%
Late-arriving aircraft
31%
Extreme weather
1%
Security
0%

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 2,229 minutes out of 6,294, against a national NAS share of 21%. The split is drawn from 6,294 reported delay minutes.

The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 86.8% on time here.

Cancellations run at 2.58%, against 1.89% nationally. That is about one flight in 40 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 stage length

What a delay here costs

9.5% 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.

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 59.0% on time across 426 flights, 16 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 16 points of difference.

One caution: this is a thin sample. 426 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. 426 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 74.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 411 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures