Austin (AUS) to Houston (IAH): On-Time Performance
Data through July 2026
The calendar drives reliability on AUS–IAH. February 2026 flights landed on schedule 93% of the time, but October 2025 dropped to 62% — a gap of 31 points. Across the full period the route averages 78% on-time against a national 78%. Morning departures also hold up better than evening ones (83% vs 74%), which matters most in the rough months.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 16 min
- completed flights
- Cancelled
- 1.5%
- Flights/day
- 7.4
- last 12 months
- Duration
- 1h 6m
- scheduled
- Distance
- 140 mi
Best airline from AUS to IAH
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 78% | 18 min | 0.8% | 246 |
| United Airlines | 78% | 15 min | 1.5% | 5,132 |
Monthly on-time trend
Best time to fly from AUS to IAH
Aim for departures around 5 a.m. (94% on-time); avoid 6 p.m. departures (64%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 76% | 18 min |
| Tuesday | 81% | 14 min |
| Wednesday | 80% | 13 min |
| Thursday | 77% | 16 min |
| Friday | 77% | 17 min |
| Saturdaybest | 81% | 13 min |
| Sunday | 74% | 18 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft39%
- Airline operations21%
- National airspace system34%
- Weather5%
Frequently asked questions
- How often are flights from AUS to IAH delayed?
- 22% of AUS–IAH 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 AUS to IAH?
- SkyWest Airlines has the best on-time record on this route at 78%, based on 246 flights. 2 airlines flew AUS–IAH frequently enough to compare in this period.
- What is the best time of day to fly from AUS to IAH?
- Departures around 5 a.m. have the best record (94% on-time), while departures around 6 p.m. have the worst (64%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from AUS to IAH?
- The scheduled AUS–IAH flight time averages 1h 6m over 140 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are AUS to IAH flights cancelled?
- 1.5% 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 AUS to IAH?
- October 2025 was the roughest month in this dataset, with only 62% of arrivals on time. The best was February 2026 at 93%. If your dates are flexible, that 31-point gap is worth planning around.
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Based on 5,378 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.