Carrier performance at one airport
UA→AUS
United Airlines at Austin-Bergstrom International
- Departures
- 10,776
- Period
- June 2025 to May 2026
- Routes
- 7
- Rank here
- #4 of 11
United Airlines at Austin lands a B, 2 points better than the national rate of 77.4%. About one flight in five arrive 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 10,776 flights, of which Delta Air Lines flew 12,986 at 81.9% on time.
Measured against the airport rather than the country, United Airlines runs 3 points ahead of the 76.7% weighted average across all carriers at AUS. That is the comparison worth making: every operator here works the same runways, the same airspace and the same weather.
Key figures
On time
79.4%
10,611 completed departures
Avg delay
75 min
Across delayed flights only
Cancelled
1.25%
At AUS, this carrier only
Rank here
#4
Of 11 carriers clearing the floor at AUS
These figures cover 11,000 flights between June 2025 and May 2026. The median arrival is 6 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.
Against the competition
Every carrier at AUS, ranked
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 81.9% of the time; JetBlue Airways manages 63.0%. Sample sizes sit next to every figure, because a two-point gap across 661 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 12,986 | 81.9% | 81 min | 1.44% | B |
| Alaska Airlines | 2,137 | 81.3% | 55 min | 1.03% | B |
| SkyWest Airlines | 7,916 | 80.0% | 86 min | 0.88% | B+ |
| United Airlines (this page) | 10,776 | 79.4% | 75 min | 1.25% | B |
| American Airlines | 11,744 | 76.2% | 115 min | 2.53% | B |
| Envoy Air | 854 | 75.6% | 78 min | 3.28% | B− |
| Southwest Airlines | 38,083 | 74.4% | 53 min | 0.55% | C+ |
| Frontier Airlines | 1,911 | 72.0% | 85 min | 2.25% | C |
| Allegiant Air | 645 | 71.0% | 77 min | 0.31% | C+ |
| Spirit Airlines | 1,112 | 63.6% | 81 min | 4.95% | D− |
| JetBlue Airways | 661 | 63.0% | 87 min | 1.36% | D |
Spirit Airlines cancels 5.0% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Route by route
Where United Airlines flies from AUS
United Airlines operates 7 routes out of AUS with enough volume to report. Route records inside one carrier at one airport still spread widely, because a short shuttle and a transcontinental have very different exposure to a late inbound.
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AUS to IAH · Houston | 2,578 | 75.8% | 65 min | 1.44% | B |
| AUS to DEN · Denver | 1,933 | 80.6% | 72 min | 1.35% | B |
| AUS to EWR · Newark | 1,698 | 78.1% | 97 min | 1.94% | B |
| AUS to SFO · San Francisco | 1,645 | 80.3% | 75 min | 0.85% | B+ |
| AUS to ORD · Chicago | 1,433 | 74.9% | 75 min | 0.98% | C+ |
| AUS to IAD · Washington | 1,033 | 89.3% | 67 min | 0.87% | A+ |
| AUS to LAX · Los Angeles | 455 | 88.7% | 91 min | 0.44% | A+ |
Departure window
Best time of day for this operation
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 27 points, against 19 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am2,481 flights89.3%
- 8am–11am1,963 flights84.5%
- 11am–2pm1,901 flights83.1%
- 2pm–5pm1,938 flights71.9%
- 5pm–8pm2,161 flights69.5%
- 8pm–5am332 flights62.4%
Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 62.4% on time, against 89.3% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in.
Across the year
Seasonal pattern
July is the worst month at 72.3% on time, 16 points below February, the best at 88.5%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck.
Delay causes
What holds this operation up
- 43%National Airspace System
- 33%Late-arriving aircraft
- 22%Carrier
- 2%Extreme weather
43% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 70,000 minutes out of 164,000, against a national NAS share of 21%.
Cancellations sit at 1.25% against a national 1.80%, which is ordinary. Diversions add another 0.28%.
7.6% of arrivals land an hour or more late, close to the national 8.2%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route are the a little over an hour kind, which a normal layover absorbs.
The sample behind these figures is 10,776 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
Put together: the calendar is the biggest lever here, not the carrier or the hour. February runs 88.5% on time and July 72.3%, a swing of 16 points. If the dates move at all, move them out of July before you think about anything else.
Common questions
United Airlines at AUS
How often is United Airlines at AUS delayed?
About one flight in five arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 20.6% of the 10,776 flights in this analysis, against 22.6% nationally. Delayed flights are late by a little over an hour on average.
Which airline is most reliable on United Airlines at AUS?
Delta Air Lines leads at 81.9% on time across 12,986 flights. JetBlue Airways is at the other end on 63.0%, a gap of 19 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on United Airlines at AUS?
The 5am–8am departure window is the strongest at 89.3% on time. The 8pm–5am window is the weakest at 62.4%, 27 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are July delays on United Airlines at AUS?
July is the weakest month at 72.3% on time, compared with 88.5% in February. Across the year that is 16 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
Source: US DOT Bureau of Transportation Statistics, on-time performance data, June 2025 to May 2026. Updated monthly. How this data is collected.