IAD to AUS flight delays & on-time performance
Nonstop flights from Washington Dulles International Airport to Austin Bergstrom International Airport · 1,297 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at IAD or AUS right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Washington (IAD) to Austin (AUS) arrived on time 85% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 1% were cancelled, and 6% arrived an hour or more late.
- Departures scheduled around 8am did best (93% on time); around 6pm did worst (73%).
- Thursday was the most reliable day to fly (90% on time) and Wednesday the least (82%).
- The largest source of delay minutes was late-arriving aircraft (39%).
Which airline is most on time from IAD to AUS?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| United Airlines | 85% | 1.0% | 10 min | 5.3% | 1,004 |
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 85% | 0.0% | 6 min | 7.7% | 14 |
| Allegiant Air | 63% | 0.0% | 21 min | 16.7% | 24 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 8am93%315 flights
- 12pm87%77 flights
- 1pm85%229 flights
- 3pm86%36 flights
- 4pm55%20 flights
- 5pm81%285 flights
- 6pm73%73 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday84%1.2% cancelled
- Tuesday89%0.0% cancelled
- Wednesday82%0.0% cancelled
- Thursday90%0.6% cancelled
- Friday83%0.0% cancelled
- Saturday82%2.0% cancelled
- Sunday85%3.5% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft39%
- Airline (crew, maintenance, cleaning, fueling)29%
- Air traffic control & airport congestion28%
- Extreme weather5%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather70%
- Airline (crew, maintenance, cleaning, fueling)20%
- Air traffic control & airport congestion10%
- Security0%
IAD to AUS: common questions
- How often are IAD to AUS flights on time?
- 85% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Washington to Austin cancelled?
- 1.0% of scheduled flights were cancelled (10 of 1,042).
- How long are typical delays?
- Across all flights the average arrival delay was 10 min (early arrivals count as zero). Flights that were late arrived 64 min behind schedule on average, and 5.6% of flights were an hour or more late.
- How long is taxi time at IAD?
- Flights on this route spent 23 min taxiing from the gate to takeoff on average.
Related routes
Return trip: AUS to IAD — 90% on time
More flights from Washington
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: IAD → AUS, nonstop flights by US airlines that report to the DOT. How we calculate this.