Houston (IAH) to Austin (AUS): On-Time Performance
Data through July 2026
Houston (IAH) to Austin (AUS) effectively runs on two schedules. In February 2026, 90% of arrivals were on time; in July 2024 that fell to 55% — a 35-point seasonal swing. Across the full period the route averages 77% on-time against a national 78%. Morning departures also hold up better than evening ones (87% vs 74%), which matters most in the rough months.
- On-time
- 77%
- arrived <15 min late
- Avg delay
- 16 min
- completed flights
- Cancelled
- 1.1%
- Flights/day
- 7.4
- last 12 months
- Duration
- 1h 3m
- scheduled
- Distance
- 140 mi
Best airline from IAH to AUS
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 79% | 17 min | 0.0% | 246 |
| United Airlines | 77% | 16 min | 1.1% | 5,132 |
Monthly on-time trend
Best time to fly from IAH to AUS
Aim for departures around 7 a.m. (91% on-time); avoid 7 p.m. departures (66%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 77% | 18 min |
| Tuesdaybest | 82% | 14 min |
| Wednesday | 80% | 14 min |
| Thursday | 76% | 16 min |
| Friday | 76% | 17 min |
| Saturday | 78% | 16 min |
| Sunday | 73% | 20 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft40%
- Airline operations32%
- National airspace system20%
- Weather8%
Frequently asked questions
- How often are flights from IAH to AUS delayed?
- 23% of IAH–AUS flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 16 minutes.
- Which airline is most reliable from IAH to AUS?
- SkyWest Airlines has the best on-time record on this route at 79%, based on 246 flights. 2 airlines flew IAH–AUS frequently enough to compare in this period.
- What is the best time of day to fly from IAH to AUS?
- Departures around 7 a.m. have the best record (91% on-time), while departures around 7 p.m. have the worst (66%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from IAH to AUS?
- The scheduled IAH–AUS flight time averages 1h 3m over 140 miles. Actual arrival times vary — flights on this route land 15+ minutes late 23% of the time.
- How often are IAH to AUS flights cancelled?
- 1.1% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from IAH to AUS?
- July 2024 was the roughest month in this dataset, with only 55% of arrivals on time. The best was February 2026 at 90%. If your dates are flexible, that 35-point gap is worth planning around.
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Based on 5,380 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.