Austin (AUS) to Boston (BOS): On-Time Performance
Data through July 2026
When you fly AUS to BOS matters as much as anything else about the booking: the route swung from 88% on-time in February 2025 to just 53% in October 2025. Across the full period the route averages 69% on-time against a national 78%. Morning departures also hold up better than evening ones (84% vs 66%), which matters most in the rough months.
- On-time
- 69%
- arrived <15 min late
- Avg delay
- 28 min
- completed flights
- Cancelled
- 2.0%
- Flights/day
- 4.6
- last 12 months
- Duration
- 4h 2m
- scheduled
- Distance
- 1,698 mi
Best airline from AUS to BOS
4 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 74% | 26 min | 2.1% | 1,920 |
| American Airlines | 72% | 32 min | 0.8% | 127 |
| JetBlue Airways | 61% | 35 min | 2.1% | 769 |
| Southwest Airlines | 54% | 27 min | 1.7% | 355 |
Monthly on-time trend
Best time to fly from AUS to BOS
Aim for departures around 7 a.m. (90% on-time); avoid 12 p.m. departures (53%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 69% | 22 min |
| Tuesday | 72% | 29 min |
| Wednesday | 72% | 21 min |
| Thursday | 64% | 35 min |
| Friday | 65% | 31 min |
| Saturdaybest | 75% | 30 min |
| Sunday | 65% | 30 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft35%
- Airline operations34%
- National airspace system30%
- Weather1%
Frequently asked questions
- How often are flights from AUS to BOS delayed?
- 31% of AUS–BOS 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 28 minutes.
- Which airline is most reliable from AUS to BOS?
- Delta Air Lines has the best on-time record on this route at 74%, based on 1,920 flights. 4 airlines flew AUS–BOS frequently enough to compare in this period.
- What is the best time of day to fly from AUS to BOS?
- Departures around 7 a.m. have the best record (90% on-time), while departures around 12 p.m. have the worst (53%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from AUS to BOS?
- The scheduled AUS–BOS flight time averages 4h 2m over 1,698 miles. Actual arrival times vary — flights on this route land 15+ minutes late 31% of the time.
- How often are AUS to BOS flights cancelled?
- 2% 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 AUS to BOS?
- October 2025 was the roughest month in this dataset, with only 53% of arrivals on time. The best was February 2025 at 88%. If your dates are flexible, that 35-point gap is worth planning around.
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Based on 3,171 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.