Flight profile · United Airlines
UA1179
Houston (IAH) to Austin (AUS) · scheduled 10:00 PM – 11:00 PM
How UA1179 performs
847 operations, September 2023 – July 2026.
UA1179 arrived on time 80.6% of the time, against 76.4% for all IAH → AUS flights, so this departure is 4.2 percentage points better than the route as a whole. Against United Airlines’ own flights on this route it is 4.4 points better.
Source: US DOT Bureau of Transportation Statistics · 847 operations, September 2023 – July 2026 · If UA1179 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where UA1179 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| UA1179 | 80.6% | 1.42% | -6 min | 8.0% | 847 |
| United Airlines on IAH → AUS | 76.2% | 1.21% | -3 min | 8.9% | 7,215 |
| All IAH → AUS flights | 76.4% | 1.17% | -3 min | 8.9% | 7,509 |
Source: FlyerIntel analysis of US DOT BTS data · September 2023 – July 2026
Why UA1179 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for UA1179 on IAH → AUS. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering September 2023 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies UA1179 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, UA1179 pushed back an average of 30 minutes late; when it came in on time or early, an average of 3 minutes late.
Each departure is matched to the flight the same aircraft flew into IAH just before it, using the tail number in the DOT file, 724 of 836 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| UA1179 | 24% | 51% | 12% |
| Network, same turn | 17% | 68% | 9% |
The schedule leaves a normal turn: enough time to clean and board if the aircraft is on time, little to spare if it is not.
The network row is every flight with a scheduled turn of 60 to 89 minutes. How often UA1179’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often UA1179 left 15 or more minutes late is lower than the network’s.
More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering September 2023 – July 2026
From pushback to gate
When it leaves IAH late, does that still matter by the time it reaches AUS?
UA1179 pushes back an average of 11.7 minutes late and reaches the gate at AUS an average of 7.0 minutes late. The 4.8 minutes between those two figures are slack the published schedule already carries, which is why a late pushback on this flight does not reliably become a late arrival. Its 17.4 minutes on the taxiways at IAH is about what any departure from the airport in that hour spends.
On arrival at AUS, UA1179 spends 6.7 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is 1.5 minutes shorter than a typical AUS arrival (8.3 min).
Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached AUS. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 4,383 departures from IAH scheduled in the clock hour UA1179 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at AUS (272,531 flights), not just UA1179’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · September 2023 – July 2026
The hour it leaves IAH
Part of any flight’s record belongs to the clock rather than to the flight. UA1179 has one departure time, so this is what that time is worth.
On-time arrival rate. 4,383 departures from IAH are scheduled in the 10 PM–11 PM hour over the period, against 359,450 across the whole day.
UA1179 is scheduled out of IAH at 10:00 PM, in the 10 PM–11 PM bank. Departures from IAH in that hour arrive on time 77.2% of the time against 77.4% across the airport’s whole day, so the hour UA1179 leaves in is an ordinary one for IAH and explains nothing about its record either way.
The two airport figures cover every departure from IAH to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · September 2023 – July 2026 · Hours below 120 departures are not scored.
By day of week
Does UA1179 run worse on particular days?
Friday is historically the most reliable day and Sunday the least, a gap of 6.0 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · September 2023 – July 2026 · Days with fewer than 120 operations are not scored.
Other routes UA1179 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| MCO→IAH Orlando to Houston | February 12, 2026 – March 28, 2026 | 45 | — |
| CHS→IAH Charleston to Houston | March 6, 2025 – February 11, 2026 | 44 | — |
| PIT→IAH Pittsburgh to Houston | December 18, 2025 – January 5, 2026 | 17 | — |
| SFO→PIT San Francisco to Pittsburgh | December 27, 2025 – January 5, 2026 | 3 | — |
| PHX→IAH Phoenix to Houston | November 28, 2023 – December 17, 2025 | 164 | 84.6% |
| SNA→IAH Santa Ana to Houston | October 1, 2023 – December 1, 2025 | 101 | 85.0% |
| SAN→IAH San Diego to Houston | May 23, 2024 – September 22, 2025 | 186 | 76.4% |
| SFO→SAN San Francisco to San Diego | May 1–21, 2025 | 21 | — |
| SEA→IAH Seattle to Houston | March 30, 2025 – April 30, 2025 | 32 | — |
| DCA→IAH Washington to Houston | December 19, 2024 – January 6, 2025 | 19 | — |
| SFO→IAH San Francisco to Houston | June 27, 2024 – August 18, 2024 | 53 | — |
| SFO→PHX San Francisco to Phoenix | January 1, 2024 – May 1, 2024 | 39 | — |
| MCI→IAH Kansas City to Houston | March 7–30, 2024 | 24 | — |
| PHL→IAH Philadelphia to Houston | October 29, 2023 – March 6, 2024 | 45 | — |
| MSP→IAH Minneapolis to Houston | February 17, 2024 | 1 | — |
| LAS→IAH Las Vegas to Houston | July 1, 2023 – September 4, 2023 | 66 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1179 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
45 min late
against a median of 6 min early
Percentiles over 847 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering September 2023 – July 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| UA1179 this flight | United Airlines | 80.6% | 6 min early | 847 |
| UA2483 | United Airlines | 76.2% | 4 min early | 703 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. UA1179 is placed in the same ordering rather than left out of it; the rows around it are the most punctual departures on the route, not all of them, so this is a comparison and not a rank. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 847 records of UA1179 operating IAH → AUS, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
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