Boston (BOS) to Austin (AUS): On-Time Performance
Data through July 2026
When you fly BOS to AUS matters as much as anything else about the booking: the route swung from 90% on-time in October 2024 to just 56% in May 2025. Across the full period the route averages 72% on-time against a national 78%. Morning departures also hold up better than evening ones (82% vs 59%), which matters most in the rough months.
- On-time
- 72%
- arrived <15 min late
- Avg delay
- 23 min
- completed flights
- Cancelled
- 1.8%
- Flights/day
- 4.6
- last 12 months
- Duration
- 4h 36m
- scheduled
- Distance
- 1,698 mi
Best airline from BOS to AUS
4 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| American Airlinesmost reliable | 86% | 18 min | 1.6% | 127 |
| Delta Air Lines | 73% | 25 min | 2.0% | 1,921 |
| JetBlue Airways | 71% | 19 min | 1.7% | 769 |
| Southwest Airlines | 64% | 22 min | 1.1% | 355 |
Monthly on-time trend
Best time to fly from BOS to AUS
Aim for departures around 9 a.m. (92% on-time); avoid 4 p.m. departures (40%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 71% | 25 min |
| Tuesday | 76% | 19 min |
| Wednesday | 73% | 19 min |
| Thursday | 71% | 24 min |
| Friday | 70% | 25 min |
| Saturdaybest | 77% | 17 min |
| Sunday | 69% | 29 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft32%
- Airline operations45%
- National airspace system22%
- Weather2%
Frequently asked questions
- How often are flights from BOS to AUS delayed?
- 28% of BOS–AUS flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 23 minutes.
- Which airline is most reliable from BOS to AUS?
- American Airlines has the best on-time record on this route at 86%, based on 127 flights. 4 airlines flew BOS–AUS frequently enough to compare in this period.
- What is the best time of day to fly from BOS to AUS?
- Departures around 9 a.m. have the best record (92% on-time), while departures around 4 p.m. have the worst (40%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from BOS to AUS?
- The scheduled BOS–AUS flight time averages 4h 36m over 1,698 miles. Actual arrival times vary — flights on this route land 15+ minutes late 28% of the time.
- How often are BOS to AUS flights cancelled?
- 1.8% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from BOS to AUS?
- May 2025 was the roughest month in this dataset, with only 56% of arrivals on time. The best was October 2024 at 90%. If your dates are flexible, that 34-point gap is worth planning around.
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Based on 3,172 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.