Route profile
BOS→AUS
Flight reliability, delays and best times to fly from Boston to Austin, 1,698 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 20% of comparable major US routes (4,598 compared)
Calculated from 4,959 flights. How this is calculated
BOS → AUS arrives on time 73.1% of the time; the return trip, AUS → BOS, arrives on time 71.0% of the time, a 2.2-point gap between the two directions of the same city pair.
BOS → AUS spends 30.8 minutes on the ground on a 1,698-mile trip: 20.7 minutes from pushback to wheels-up at BOS and 10.1 minutes from touchdown to gate at AUS.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Why BOS → AUS flights are cancelled
July 2023 – July 2026
BOS → AUS cancelled 68 of 4,959 scheduled flights — about 1 in every 73. The reason filed most often was the airline, 45.6% of the cancellations coded on this route — about 1 in every 160 scheduled flights.
Share of cancellations
Of 68 cancelled departures carrying a reason code.
What each reason means
Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.
31 cancellations, 45.6% of the total.
Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.
28 cancellations, 41.2% of the total.
Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.
9 cancellations, 13.2% of the total.
A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.
0 cancellations, 0.0% of the total.
Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.
68 coded cancellations were recorded on BOS → AUS; the section appears from 50.
When it goes wrong
July 2023 – July 2026
62 min late
against a median of 6 min early
BOS → AUS has an average that understates its risk: a typical arrival is 6 min early, but the worst tenth are 68 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 4,959 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at AUS after arriving from BOS.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 41% | Likely to miss |
| 45 min | 26% | High risk |
| 60 min | 18% | High risk |
| 90 min | 10% | Some risk |
| 120 min | 6.6% | Some risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 1.37% of the time and diverts 0.42% of the time, which a late arrival never shows up in.
Chance of missing is the share of 4,870 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 62 minutes late (90th-percentile gate arrival delay), over 4,959 operations.
Any other layover length: connection checker.
Best time to fly
BOS → AUS flights departing 5–9 AM arrived on time 83.3% of the time, against 59.8% for 6–9 PM departures, a gap of 23.5 percentage points.
By departure window
By departure hour
- 12 AM to 5 AM: too few flights to score
- 6 AM: 82.3% on time from 1,036 flights
- 7 AM: 85.1% on time from 640 flights
- 8 AM: 83.1% on time from 222 flights
- 9 AM: 83.3% on time from 168 flights
- 10 AM: 69.2% on time from 187 flights
- 11 AM: too few flights to score
- 12 PM: 73.3% on time from 343 flights
- 1 PM: 71.5% on time from 696 flights
- 2 PM: 64.8% on time from 324 flights
- 3 PM: 59.7% on time from 135 flights
- 4 PM: too few flights to score
- 5 PM: 69.8% on time from 257 flights
- 6 PM: 58.0% on time from 522 flights
- 7 PM: 63.6% on time from 263 flights
- 8 PM to 11 PM: too few flights to score
Why BOS → AUS runs late
July 2023 – July 2026
crew, maintenance, boarding and fueling, all within the carrier’s control
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for BOS → AUS. Only delays of 15 minutes or more are attributed.
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| Delta Air Lines | 2,729 | 73.1% | 1.65% | -6 min | 11.5% |
| JetBlue | 1,188 | 72.1% | 1.35% | -5 min | 9.2% |
| American Airlines | 679 | 80.1% | 0.44% | -11 min | 7.6% |
| Southwest Airlines | 363 | 63.5% | 1.10% | 3 min | 13.1% |
Delta Air Lines flew 55.0% of the 4,959 flights listed. Delta Air Lines cancelled 1.65% of its flights here against 0.44% for American Airlines.
American Airlines arrived on time 16.6 percentage points more often than Southwest Airlines on this route.
Flights on this route
Flight numbers with at least 600 operations here and still on the schedule.
Weekly and seasonal patterns
By day of week
Saturday is historically the most reliable day and Sunday the least, a gap of 8.1 percentage points.
By month
- Jan: 67.9%
- Feb: 79.2%
- Mar: 80.7%
- Apr: 77.4%
- May: 64.1%
- Jun: 70.8%
- Jul: 67.1%
- Aug: 74.0%
- Sep: 71.2%
- Oct: 77.3%
- Nov: 77.2%
- Dec: 75.1%
May is historically the weakest month and March the strongest, a spread of 16.6 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: 64.2% from 170 flights
- August 2023: 79.4% from 180 flights
- September 2023: 69.1% from 193 flights
- October 2023: 74.4% from 207 flights
- November 2023: 74.1% from 162 flights
- December 2023: 82.9% from 141 flights
- January 2024: too few flights to score (112)
- February 2024: too few flights to score (93)
- March 2024: too few flights to score (107)
- April 2024: 74.5% from 139 flights
- May 2024: 63.1% from 150 flights
- June 2024: 71.2% from 133 flights
- July 2024: 68.8% from 132 flights
- August 2024: 73.0% from 126 flights
- September 2024: 80.8% from 120 flights
- October 2024: 90.0% from 120 flights
- November 2024: too few flights to score (99)
- December 2024: too few flights to score (112)
- January 2025: too few flights to score (90)
- February 2025: too few flights to score (87)
- March 2025: too few flights to score (110)
- April 2025: too few flights to score (106)
- May 2025: too few flights to score (118)
- June 2025: 69.2% from 137 flights
- July 2025: 67.9% from 142 flights
- August 2025: 67.9% from 141 flights
- September 2025: 65.4% from 137 flights
- October 2025: 71.1% from 151 flights
- November 2025: 73.1% from 131 flights
- December 2025: 69.7% from 125 flights
- January 2026: too few flights to score (98)
- February 2026: too few flights to score (119)
- March 2026: 78.4% from 145 flights
- April 2026: 81.2% from 138 flights
- May 2026: 70.3% from 145 flights
- June 2026: 71.9% from 162 flights
- July 2026: 67.8% from 181 flights
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 72.1% against 73.4% in the 12 months before — broadly unchanged.
Data and methodology
Calculated by FlyerIntel from 4,959 BOS → AUS flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed