Route profile
IAH→AUS
Flight reliability, delays and best times to fly from Houston to Austin, 140 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 36% of comparable major US routes (4,598 compared)
Calculated from 7,509 flights. How this is calculated · What counts as on time
IAH → AUS arrives on time 76.4% of the time; the return trip, AUS → IAH, arrives on time 78.5% of the time, a 2.1-point gap between the two directions of the same city pair.
IAH → AUS spends 29.2 minutes on the ground on a 140-mile trip: 22.1 minutes from pushback to wheels-up at IAH and 7.1 minutes from touchdown to gate at AUS.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What sets this route apart
Where IAH to AUS differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
IAH to AUS is at its best against routes of similar length for flights scheduled at 9 PM: 81.9% arrive on time, 7.7 points ahead of the 74.2% those routes manage at that hour. Against all other routes the gap is 12.4 points.
IAH to AUS struggles most at 10 AM: 81.6% of its flights scheduled then arrive on time, 5.9 points behind the 87.5% on routes of similar length at the same hour.
Sunday is the day IAH to AUS slips furthest against routes of similar length, 70.9% on time where they average 77.0%, 6.1 points lower. Against all other routes the gap is 3.9 points.
In May, IAH to AUS runs 9.2 points below routes of similar length, 68.1% on time to 77.3%. Against all other routes the gap is 7.2 points.
February is kinder to IAH to AUS than to routes of similar length: 86.9% on time against 82.9%, 4 points better. Against all other routes the gap is 5.5 points.
IAH to AUS against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 9 PM departures | 81.9% | routes of similar length | 74.2% | +7.7 pts | 465 here, 3,575 there |
| Hour: 10 AM departures | 81.6% | routes of similar length | 87.5% | −5.9 pts | 354 here, 5,083 there |
| Weekday: Sunday | 70.9% | routes of similar length | 77.0% | −6.1 pts | 1,073 here, 14,748 there |
| Month: May | 68.1% | routes of similar length | 77.3% | −9.2 pts | 612 here, 8,386 there |
| Month: February | 86.9% | routes of similar length | 82.9% | +4.0 pts | 574 here, 7,458 there |
Each comparison pools the flights of other routes, with this route’s own left out. Similar length means within 15% of this route’s 140 miles, with at least 5 such routes. A bucket is set against the most comparable group that has enough flights: similar length, then the same origin (at least 3 routes), then all other routes. Hours, weekdays and months appear only where both sides have 120 completed flights, and airlines where both have 600. The gap must be at least 2 points and 2 standard errors, and only the largest gap each way is kept per measure. These are differences in the flights counted, not causes.
Why IAH → AUS flights are cancelled
July 2023 – July 2026
IAH → AUS cancelled 88 of 7,509 scheduled flights — about 1 in every 85. The reason filed most often was extreme weather, 60.2% of the cancellations coded on this route — about 1 in every 142 scheduled flights.
Share of cancellations
Of 88 cancelled departures carrying a reason code.
What each reason means
Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.
53 cancellations, 60.2% of the total.
Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.
26 cancellations, 29.5% of the total.
Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.
9 cancellations, 10.2% of the total.
A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.
0 cancellations, 0.0% of the total.
Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. With only one or two carriers on the route, the split mostly reflects how they file. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.
88 coded cancellations were recorded on IAH → AUS; the section appears from 50.
When it goes wrong
July 2023 – July 2026
52 min late
against a median of 3 min early
Percentiles over 7,509 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at AUS after arriving from IAH.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 41% | Likely to miss |
| 45 min | 23% | High risk |
| 60 min | 16% | High risk |
| 90 min | 8.7% | Some risk |
| 120 min | 5.3% | Some risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 1.17% of the time and diverts 0.08% of the time, which a late arrival never shows up in.
Chance of missing is the share of 7,415 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 52 minutes late (90th-percentile gate arrival delay), over 7,509 operations.
Any other layover length: connection checker.
Best time to fly
IAH → AUS flights departing 5–9 AM arrived on time 89.9% of the time, against 68.8% for 3–6 PM departures, a gap of 21.1 percentage points.
By departure window
By departure hour
- 12 AM to 6 AM: too few flights to score
- 7 AM: 90.0% on time from 957 flights
- 8 AM: too few flights to score
- 9 AM: 83.1% on time from 281 flights
- 10 AM: 81.6% on time from 355 flights
- 11 AM: 78.4% on time from 148 flights
- 12 PM: 81.5% on time from 599 flights
- 1 PM: too few flights to score
- 2 PM: 75.4% on time from 961 flights
- 3 PM: too few flights to score
- 4 PM: 68.2% on time from 908 flights
- 5 PM: 73.8% on time from 125 flights
- 6 PM: 71.3% on time from 1,075 flights
- 7 PM: too few flights to score
- 8 PM: 68.2% on time from 1,032 flights
- 9 PM: 81.9% on time from 471 flights
- 10 PM: 78.0% on time from 506 flights
- 11 PM: too few flights to score
Why IAH → AUS runs late
July 2023 – July 2026
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
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 IAH → AUS. Only delays of 15 minutes or more are attributed. What the five causes mean
Late-arriving aircraft is the largest cause on IAH → AUS, at 40.4%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 89.9% of the time and 3–6 PM departures 68.8%.
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| United Airlines | 7,215 | 76.2% | 1.21% | -3 min | 8.9% |
| SkyWest Airlines | 292 | 80.1% | 0.34% | -2 min | 10.0% |
United Airlines flew 96.1% of the 7,507 flights listed.
SkyWest Airlines arrived on time 3.9 percentage points more often than United Airlines on this route.
Flights on this route
Flight numbers with at least 600 operations here and still on the schedule.
| Flight | Scheduled | Operations | On time |
|---|---|---|---|
| UA1179 United Airlines | 10:00 PM | 847 | 80.6% |
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Sunday the least, a gap of 10.4 percentage points.
By month
- Jan: 81.6%
- Feb: 86.9%
- Mar: 78.0%
- Apr: 80.8%
- May: 68.1%
- Jun: 65.5%
- Jul: 65.5%
- Aug: 75.1%
- Sep: 81.7%
- Oct: 77.7%
- Nov: 79.5%
- Dec: 79.4%
June is historically the weakest month and February the strongest, a spread of 21.4 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: 71.2% from 225 flights
- August 2023: 74.6% from 183 flights
- September 2023: 73.4% from 186 flights
- October 2023: 72.5% from 212 flights
- November 2023: 83.5% from 164 flights
- December 2023: 85.0% from 153 flights
- January 2024: 75.3% from 157 flights
- February 2024: 86.8% from 159 flights
- March 2024: 76.6% from 194 flights
- April 2024: 76.7% from 148 flights
- May 2024: 52.2% from 165 flights
- June 2024: 62.4% from 183 flights
- July 2024: 55.2% from 193 flights
- August 2024: 74.1% from 189 flights
- September 2024: 82.4% from 187 flights
- October 2024: 80.1% from 216 flights
- November 2024: 83.6% from 214 flights
- December 2024: 73.9% from 190 flights
- January 2025: 81.4% from 205 flights
- February 2025: 83.7% from 202 flights
- March 2025: 78.3% from 236 flights
- April 2025: 80.3% from 229 flights
- May 2025: 72.1% from 235 flights
- June 2025: 60.3% from 200 flights
- July 2025: 65.2% from 188 flights
- August 2025: 76.5% from 214 flights
- September 2025: 87.8% from 237 flights
- October 2025: 80.2% from 237 flights
- November 2025: 72.5% from 222 flights
- December 2025: 80.1% from 231 flights
- January 2026: 85.8% from 239 flights
- February 2026: 90.1% from 213 flights
- March 2026: 79.0% from 235 flights
- April 2026: 83.9% from 230 flights
- May 2026: 75.4% from 228 flights
- June 2026: 73.1% from 201 flights
- July 2026: 68.9% from 209 flights
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 79.6% against 76.4% in the 12 months before — improving by 3.2 percentage points.
Data and methodology
Calculated by FlyerIntel from 7,509 IAH → AUS flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed