Flight number record
UA 525
United Airlines · Austin to Washington
- Route
- AUS → IAD
- Departs
- 07:15
- Flights
- 322
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 525, check with United Airlines.
UA 525 earns an A. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 322 flights, with a median arrival 11 minutes early.
Set against the rest of the country, UA 525's record is 16 points better than the US average of 77.3%. That gap is worth roughly 161 fewer late arrivals for every thousand flights.
Key figures
On time
93.4%
Arrivals under 15 minutes late, of 317 completed flights
Avg delay
67 min
Across delayed arrivals only, not all flights
Cancelled
1.24%
National rate is 1.89%
1 hour+ late
1.9%
National rate is 8.3%
These figures cover 322 flights between September 2025 and August 2026. The median arrival is 11 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When UA 525 flies
UA 525 flies AUS to IAD without a single fixed slot. Its most common scheduled departure was 07:15, used on 196 of 322 flights, with 07:30 (115 flights) next.
- Departs 07:15196 flights60.9%
- Departs 07:30115 flights35.7%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 07:15 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and UA 525 runs 4 points better at 93.4%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
UA 525 next to AUS to IAD
Every carrier on AUS to IAD combined arrived on time 89.2% of the time across 1,019 flights, so UA 525 is 4 points ahead of it. United flew 988 flights on the same city pair under all its flight numbers, including this one, and those ran 90.1% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 15 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 525thin sample | 322 | 93.4% | 67 min | 1.24% | A |
| All United Airlines on AUS–IAD | 988 | 90.1% | 91 min | 0.81% | A+ |
| All carriers on AUS–IAD | 1,019 | 89.2% | 103 min | 0.79% | A+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 525 quarter by quarter
Quarter by quarter UA 525 held fairly steady: 92.3% in Oct–Dec 2025, 95.5% in Jan–Mar 2026, 93.3% in Apr–Jun 2026 and 89.1% in Jul–Sep 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202527 flights—
- Oct–Dec 202578 flights92.3%
- Jan–Mar 202670 flights95.5%
- Apr–Jun 202691 flights93.3%
- Jul–Sep 202656 flights89.1%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, UA 525 did best on Tuesday at 100.0% on time and worst on Friday at 87.5%. Each day rests on about 46 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 525 runs when it is late
UA 525 often beats the schedule: 104 of 317 completed flights, 33%, arrived 15 minutes or more early. Most of the lateness is short. 13 of the 21 late arrivals were under half an hour behind, and 6 reached an hour or more.
- 15+ min early104 flights32.8%
- Within 15 min192 flights60.6%
- 15–29 min late13 flights4.1%
- 30–59 min late2 flights0.6%
- 1–2 hours late4 flights1.3%
- 2+ hours late2 flights0.6%
Scale runs 0% to 100%.
Share of 317 completed flights by arrival against schedule.
5 of 20 late departures made up the time and arrived on time, 25% of them. Only 6 left on time and still arrived late.
The worst days
Worst days for UA 525
The latest arrival of the period was on 15 August 2026, 6 hours 7 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 15 August 2026 | 6 hours 7 minutes | Carrier |
| 23 November 2025 | 5 hours 43 minutes | Late-arriving aircraft |
| 21 August 2026 | 1 hour 52 minutes | Carrier |
| 30 November 2025 | 1 hour 41 minutes | Carrier |
| 11 December 2025 | 1 hour 16 minutes | Carrier |
Delay causes
Why UA 525 runs late
Carrier accounts for 63% of the 1,397 delay minutes carriers reported here, and the remaining four split what is left.
- 63%Carrier
- 22%Late-arriving aircraft
- 11%National Airspace System
- 4%Extreme weather
The largest share of delay minutes, 63%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 879 of the 1,397 delay minutes reported here. The split is drawn from 1,397 delay minutes reported on UA 525.
Cancellations sit at 1.24% against a national 1.89%, which is ordinary. Diversions add another 0.31%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 1.9% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 1,297 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The same number turns up on one other city pair in the data, including DEN to TUS (19), but none flew often enough under UA 525 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to AUS to IAD only.
One caution: this is a thin sample. 322 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking UA 525
For a booking, UA 525 has one of the better records a US domestic flight can show: 93.4% on time and 1.24% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- AUS to IAD, every carrier and departure
- IAD to AUS, the return direction
- United Airlines 2344 on the same route88.7%
- United Airlines 376 on the same route86.6%
- Austin-Bergstrom International (AUS) delay statistics
- Washington Dulles International (IAD) delay statistics
- United Airlines on-time record
- Every United Airlines flight number with a record
- The most and least reliable flight numbers in the US
- How to read this site: grades, sample sizes, and honest caveats
A flight number here means United Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.