Austin (AUS) to Dulles (IAD) flights
United Airlines, Mesa Airlines, Allegiant Air fly nonstop from Austin Bergstrom International Airport to Washington Dulles International Airport, with about 23 flights a week in July 2026. The 1,297-mile flight takes about 3h 11m gate to gate.
- Distance
- 1,297 mi · 2,087 km
- Flight time
- 3h 11m
- Airlines
- 3
- Seats filled
- 83%
Airlines flying AUS to IAD
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| United Airlines | 18 | Boeing 737-700 / MAX 7, Boeing 737-900ER, Boeing 737 MAX 8 | 131,329 | 3h 10m |
| Mesa Airlines | 3 | Embraer E175 | 5,257 | 3h 17m |
| Allegiant Air | 2 | Airbus A320-100/200 | 4,093 | 3h 12m |
| Republic AirlineSeasonal or ended | n/a | Embraer E175, Embraer E170 | 810 | 3h 15m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
AUS to IAD flight schedule
3 flight numbers flew this route in August 2026, 3 of them almost daily. The first usually leaves at 7:30am and the last at 4:55pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| UA 525United Airlines | 7:30am | 11:44am | 25 | 93% |
| UA 2344United Airlines | 12:05pm | 4:21pm | 26 | 89% |
| UA 376United Airlines | 4:55pm | 9:11pm | 27 | 87% |
Is AUS to IAD on time?
From September 2025 to August 2026, 89% of 1,105 flights arrived within 15 minutes of schedule and 0.7% were cancelled. Flights leaving around 7am were the most punctual (94%), those around 5pm the least (82%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (51%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| United Airlines | 1,085 | 90% | 13 min | 0.7% |
| Allegiant Air | 20 | 50% | 32 min | 0% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 7am to 8am | 341 | 94% | |
| 10am to 11am | 24 | 100% | |
| 12pm to 1pm | 360 | 90% | |
| 4pm to 5pm | 154 | 89% | |
| 5pm to 6pm | 205 | 82% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 105 | 11,944 | |
| September 2025 | 112 | 12,941 | |
| October 2025 | 93 | 13,149 | |
| November 2025 | 89 | 11,294 | |
| December 2025 | 93 | 11,034 | |
| January 2026 | 76 | 8,165 | |
| February 2026 | 77 | 9,123 | |
| March 2026 | 93 | 11,902 | |
| April 2026 | 90 | 12,712 | |
| May 2026 | 94 | 13,497 | |
| June 2026 | 99 | 13,108 | |
| July 2026 | 100 | 12,620 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.