Washington (IAD) to Austin (AUS): On-Time Performance
Data through May 2026
Washington (IAD) to Austin (AUS) effectively runs on two schedules. In October 2024, 97% of arrivals were on time; in June 2025 that fell to 62% — a 34-point seasonal swing. Across the full period the route averages 82% on-time against a national 78%. Morning departures also hold up better than evening ones (92% vs 72%), which matters most in the rough months.
- On-time
- 82%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 0.9%
- Flights/day
- 2.9
- last 12 months
- Duration
- 3h 38m
- scheduled
- Distance
- 1,297 mi
Monthly on-time trend
Best time to fly from IAD to AUS
Aim for departures around 8 a.m. (92% on-time); avoid 4 p.m. departures (63%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 79% | 15 min |
| Tuesdaybest | 87% | 14 min |
| Wednesday | 82% | 12 min |
| Thursday | 84% | 10 min |
| Friday | 84% | 11 min |
| Saturday | 75% | 16 min |
| Sunday | 80% | 15 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft38%
- Airline operations28%
- National airspace system24%
- Weather10%
Frequently asked questions
- How often are flights from IAD to AUS delayed?
- 18% of IAD–AUS 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 13 minutes.
- What is the best time of day to fly from IAD to AUS?
- Departures around 8 a.m. have the best record (92% on-time), while departures around 4 p.m. have the worst (63%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from IAD to AUS?
- The scheduled IAD–AUS flight time averages 3h 38m over 1,297 miles. Actual arrival times vary — flights on this route land 15+ minutes late 18% of the time.
- How often are IAD to AUS flights cancelled?
- 0.9% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from IAD to AUS?
- June 2025 was the roughest month in this dataset, with only 62% of arrivals on time. The best was October 2024 at 97%. If your dates are flexible, that 34-point gap is worth planning around.
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Based on 2,038 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.