Austin (AUS) to Boston (BOS): On-Time Performance
Data through May 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 (85% vs 67%), which matters most in the rough months.
- On-time
- 69%
- arrived <15 min late
- Avg delay
- 29 min
- completed flights
- Cancelled
- 1.8%
- Flights/day
- 4.4
- last 12 months
- Duration
- 4h 1m
- scheduled
- Distance
- 1,698 mi
Best airline from AUS to BOS
4 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 75% | 25 min | 2.1% | 1,815 |
| American Airlines | 71% | 41 min | 0.6% | 157 |
| JetBlue Airways | 61% | 36 min | 1.5% | 687 |
| Southwest Airlines | 52% | 28 min | 1.7% | 302 |
Monthly on-time trend
Best time to fly from AUS to BOS
Aim for departures around 7 a.m. (89% on-time); avoid 12 p.m. departures (53%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 69% | 22 min |
| Tuesday | 75% | 27 min |
| Wednesday | 72% | 21 min |
| Thursday | 62% | 40 min |
| Friday | 65% | 30 min |
| Saturdaybest | 76% | 30 min |
| Sunday | 65% | 33 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft36%
- Airline operations35%
- National airspace system28%
- 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 2024-06 and 2026-05. The average arrival delay across completed flights was 29 minutes.
- Which airline is most reliable from AUS to BOS?
- Delta Air Lines has the best on-time record on this route at 75%, based on 1,815 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 (89% 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 1m 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?
- 1.8% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, 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 2,961 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.