AUS to IAD flight delays & on-time performance
Nonstop flights from Austin Bergstrom International Airport to Washington Dulles International Airport · 1,297 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at AUS or IAD right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Austin (AUS) to Washington (IAD) arrived on time 90% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 1% were cancelled, and 4% arrived an hour or more late.
- Departures scheduled around 10am did best (94% on time); around 5pm did worst (83%).
- Tuesday was the most reliable day to fly (93% on time) and Friday the least (87%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (46%).
Which airline is most on time from AUS to IAD?
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 | 91% | 1.0% | 8 min | 3.3% | 1,004 |
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 79% | 0.0% | 193 min | 21.4% | 14 |
| Allegiant Air | 58% | 0.0% | 28 min | 12.5% | 24 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am94%346 flights
- 10am94%36 flights
- 12pm90%333 flights
- 3pm44%16 flights
- 4pm91%145 flights
- 5pm83%162 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday90%2.4% cancelled
- Tuesday93%0.0% cancelled
- Wednesday91%0.0% cancelled
- Thursday90%0.0% cancelled
- Friday87%0.6% cancelled
- Saturday90%1.0% cancelled
- Sunday89%2.8% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)46%
- Late-arriving aircraft32%
- Air traffic control & airport congestion20%
- Extreme weather1%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather70%
- Airline (crew, maintenance, cleaning, fueling)20%
- Air traffic control & airport congestion10%
- Security0%
AUS to IAD: common questions
- How often are AUS to IAD flights on time?
- 90% 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 Austin to Washington 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 11 min (early arrivals count as zero). Flights that were late arrived 100 min behind schedule on average, and 3.8% of flights were an hour or more late.
- How long is taxi time at AUS?
- Flights on this route spent 17 min taxiing from the gate to takeoff on average.
Related routes
Return trip: IAD to AUS — 85% on time
More flights from Austin
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: AUS → IAD, nonstop flights by US airlines that report to the DOT. How we calculate this.