88% of flights from Austin to Washington arrived on time over the past 12 months. That is better than the typical U.S. route. The 7 a.m. departures ran on time 92% of the time; the 5 p.m. ones 81%. 6% of flights arrived more than an hour late or not at all.
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for AUS → IAD: when a flight was late, it was under 45 minutes late 48% of the time. About 1 in 21 flights landed an hour or more late, and 1 in 92 three hours or more; 0.7% were cancelled outright.
- On time or early88%
- 15–30 min late3.6%
- 30–60 min late2.7%
- 1–2 hours late2.5%
- 2–3 hours late1.1%
- 3+ hours late1.1%
- Diverted0.1%
- Cancelled0.7%
Share of all 1,105 scheduled flights, past 12 months, by arrival time against schedule.
By airline
| Airline | Flights | On time | Cancelled | Typical arrival | 1h+ late | Avg when late | Operated by |
|---|---|---|---|---|---|---|---|
| United Airlines | 1,085 | 89% | 0.7% | −8 min | 4.5% | +114 min | United Airlines 91%, Mesa Airlines 8%, Republic Airways 1% |
| Allegiant Air | 20 | — | — | — | — | — | Allegiant Air |
Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.
Best time of day to fly
On-time rate by scheduled departure hour (local time at AUS). Delays build through the day as late planes knock on, so early flights usually do best.
By airline and hour
| Departs | United Airlines |
|---|---|
| 7 a.m. | 92% |
| noon | 89% |
| 4 p.m. | 89% |
| 5 p.m. | 81% |
Last flight of the day
On AUS → IAD, each airline's last flight of the day was cancelled 0.5% of the time, against 0.8% for its earlier flights, so here the last flight is actually the safer one. It arrived 3+ hours late 1.6% of the time (earlier flights: 0.8%). It matters more than the numbers suggest. Miss an earlier flight and there's another one that evening; miss the last one and you're usually waiting until morning.
| Airline | Last departure | Last: cancelled | Last: 3h+ late | Earlier: cancelled | Next morning |
|---|---|---|---|---|---|
| United Airlines | 5:00 p.m. | 0.5% | 1.6% | 0.8% | first flight 7:30 a.m. |
Last flight = the airline's last scheduled departure on this route that day, on days it flies the route at least twice; past 12 months. Times are typical scheduled times over the latest three months.
By month
Each calendar month pooled over 2023–2026. Best: April (93%). Worst: July (76%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 173 | 86% | 1.7% |
| Tuesday | 147 | 93% | 0.0% |
| Wednesday | 151 | 92% | 0.0% |
| Thursday | 159 | 89% | 0.0% |
| Friday | 169 | 86% | 0.6% |
| Saturday | 148 | 88% | 0.0% |
| Sunday | 158 | 85% | 2.5% |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: weather 7 · air traffic/airport 1
Month by month
Flight numbers on this route
Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.
| Flight | Departs | Flights | On time | Cancelled | Typical arrival | Operated by |
|---|---|---|---|---|---|---|
| UA 525 | 7:15 a.m. | 322 | 92% | 1.2% | −11 min | United Airlines |
| UA 2344 | 12:00 p.m. | 302 | 88% | 0.7% | −5 min | United Airlines |
| UA 376 | 5:00 p.m. | 278 | 86% | 0.7% | −5 min | United Airlines |
Worst days in the past year
| Date | Flights | On time | Cancelled |
|---|---|---|---|
| Mar 16, 2026 | 3 | 0% | 0 |
| Mar 11, 2026 | 3 | 0% | 0 |
| Jan 25, 2026 | 3 | 0% | 3 |
| Jul 18, 2026 | 3 | 0% | 0 |
| Dec 5, 2025 | 3 | 0% | 0 |
Nearby airport alternatives
Other ways to make the same trip, using airports within 60 miles of Austin or Washington. None has been clearly more reliable than AUS → IAD.
| Route | Flights | On time | Cancelled |
|---|---|---|---|
| AUS → IAD (this route) | 1,105 | 88% | 0.7% |
| AUS → BWI Austin-Bergstrom to Baltimore/Washington | 1,273 | 74% | 1.7% |
Questions
How often are flights from AUS to IAD on time?
88% of 1,105 scheduled flights from Austin, TX to Washington, DC arrived within 15 minutes of schedule between September 2025 and August 2026. 0.7% were cancelled.
What is the best time of day to fly AUS to IAD?
Flights scheduled to leave at 7 a.m. were the most reliable (92% on time). The 5 p.m. departures were the least (81%).
What month has the most delays from AUS to IAD?
July (76% on time). The best month is April (93%), over 2023–2026.
Is the last flight of the day from AUS to IAD more likely to be cancelled?
No, the opposite. Each airline's last AUS–IAD flight of the day was cancelled 0.5% of the time over the past year, against 0.8% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.
Related
- IAD → AUS (return)
- Austin-Bergstrom (AUS) delays by hour
- Flights into Washington Dulles (IAD)
- United Airlines on-time record
- Allegiant Air on-time record
- Connecting off this flight? Check the risk
Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.