Flight number record
UA 1179
United Airlines · Houston to Austin
- Route
- IAH → AUS
- Departs
- 22:15
- Flights
- 316
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1179, check with United Airlines.
UA 1179 lands a B+, 3 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 316 flights, with a median arrival 5 minutes early.
Key figures
On time
80.5%
Arrivals under 15 minutes late, of 313 completed flights
Avg delay
72 min
Across delayed arrivals only, not all flights
Cancelled
0.95%
National rate is 1.89%
1 hour+ late
8.6%
National rate is 8.3%
These figures cover 316 flights between September 2025 and August 2026. Beyond the headline rate, 8.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When UA 1179 flies
UA 1179 flies IAH to AUS without a single fixed slot. Its most common scheduled departure was 22:15, used on 127 of 316 flights, with 21:55 (48 flights) next.
- Departs 22:15127 flights40.2%
- Departs 21:5548 flights15.2%
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 22:15 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and UA 1179 runs 10 points better at 80.5%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
UA 1179 next to IAH to AUS
Every carrier on IAH to AUS combined arrived on time 80.2% of the time across 2,671 flights, so UA 1179 is about level with it. United flew 2,645 flights on the same city pair under all its flight numbers, including this one, and those ran 80.1% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1179thin sample | 316 | 80.5% | 72 min | 0.95% | B+ |
| All United Airlines on IAH–AUS | 2,645 | 80.1% | 62 min | 0.72% | B+ |
| All carriers on IAH–AUS | 2,671 | 80.2% | 62 min | 0.71% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1179 quarter by quarter
UA 1179 did not run the same all year. Its best quarter was Oct–Dec 2025 at 85.9% on time and its weakest Jul–Sep 2026 at 67.9%, a swing of 18 points on roughly 79 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202528 flights—
- Oct–Dec 202571 flights85.9%
- Jan–Mar 202680 flights85.9%
- Apr–Jun 202681 flights76.2%
- Jul–Sep 202656 flights67.9%
Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, UA 1179 did best on Tuesday at 87.5% on time and worst on Sunday at 68.0%. Each day rests on about 45 flights, so a gap of 20 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1179 runs when it is late
The 61 late arrivals split 17 under half an hour, 17 between 30 and 60 minutes, and 27 an hour or more.
- 15+ min early57 flights18.2%
- Within 15 min195 flights62.3%
- 15–29 min late17 flights5.4%
- 30–59 min late17 flights5.4%
- 1–2 hours late17 flights5.4%
- 2+ hours late10 flights3.2%
Scale runs 0% to 100%.
Share of 313 completed flights by arrival against schedule.
15 of 72 late departures made up the time and arrived on time, 21% of them. Only 4 left on time and still arrived late.
The worst days
Worst days for UA 1179
The latest arrival of the period was on 9 November 2025, 7 hours 58 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 9 November 2025 | 7 hours 58 minutes | Carrier |
| 7 March 2026 | 5 hours 9 minutes | Late-arriving aircraft |
| 2 June 2026 | 3 hours 7 minutes | Late-arriving aircraft |
| 1 May 2026 | 3 hours 6 minutes | Late-arriving aircraft |
| 26 May 2026 | 2 hours 37 minutes | Extreme weather |
Delay causes
Why UA 1179 runs late
Carrier accounts for 45% of the 4,415 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Carrier
- 41%Late-arriving aircraft
- 11%National Airspace System
- 3%Extreme weather
41% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,415 reported delay minutes here, that single category outweighs weather by 13 to one. The split is drawn from 4,415 delay minutes reported on UA 1179.
Cancellations sit at 0.95% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
8.6% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
The same number turns up on eight other city pairs in the data, including MCO to IAH (45), SNA to IAH (36) and CHS to IAH (30), but none flew often enough under UA 1179 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAH to AUS only.
One caution: this is a thin sample. 316 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 1179
For a booking, read UA 1179 as 80.5% on time with 0.95% cancelled over 316 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- IAH to AUS, every carrier and departure
- AUS to IAH, the return direction
- United Airlines 1711 on the same route68.5%
- United Airlines 1859 on the same route82.7%
- United Airlines 2621 on the same route73.8%
- George Bush Intercontinental (IAH) delay statistics
- Austin-Bergstrom International (AUS) 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
- Why the first flight of the morning is statistically safest
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.