Route
AUS → IAD
Austin Bergstrom International Airport Washington Dulles International Airport
1,297 miles
Return route IAD → AUS →
How punctual is this route?
- On-time arrivals
- 89.2%
- Less than 15 minutes late
- Cancelled
- 0.8%
- Of scheduled flights
- Average delay when late
- 113 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,019
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 48%
- Late-arriving aircraft 31%
- Air traffic control & airport 20%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 97.3% | 110 |
| October 2025 | 95.5% | 89 |
| November 2025 | 87.3% | 79 |
| December 2025 | 87.0% | 77 |
| January 2026 | 90.9% | 71 |
| February 2026 | 92.1% | 76 |
| March 2026 | 85.7% | 92 |
| April 2026 | 92.7% | 82 |
| May 2026 | 92.0% | 88 |
| June 2026 | 83.9% | 88 |
| July 2026 | 81.6% | 89 |
| August 2026 | 82.1% | 78 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| United Airlines | 988 | 90.1% | 0.8% | 101 min |
| Allegiant Air | 20 | 50.0% | 0.0% | 65 min |
| Republic Airways | 11 | 81.8% | 0.0% | 906 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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