AUS to IAH flight delays & on-time performance
Nonstop flights from Austin Bergstrom International Airport to George Bush Intercontinental Airport · 140 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at AUS or IAH right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Austin (AUS) to Houston (IAH) arrived on time 76% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.2% were cancelled, and 6% arrived an hour or more late.
- Departures scheduled around 5am did best (95% on time); around 7am did worst (65%).
- Saturday was the most reliable day to fly (80% on time) and Sunday the least (72%).
- The largest source of delay minutes was air traffic control & airport congestion (45%).
Which airline is most on time from AUS to IAH?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 87% | 0.0% | 8 min | 2.6% | 39 |
| United Airlines | 76% | 1.2% | 15 min | 5.9% | 2,656 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am95%350 flights
- 7am65%364 flights
- 9am76%354 flights
- 12pm71%323 flights
- 1pm77%35 flights
- 2pm82%317 flights
- 4pm67%277 flights
- 5pm68%258 flights
- 6pm66%101 flights
- 7pm84%309 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday74%1.5% cancelled
- Tuesday77%1.1% cancelled
- Wednesday78%1.0% cancelled
- Thursday76%0.5% cancelled
- Friday76%1.3% cancelled
- Saturday80%1.5% cancelled
- Sunday72%1.3% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Air traffic control & airport congestion45%
- Late-arriving aircraft30%
- Airline (crew, maintenance, cleaning, fueling)20%
- Extreme weather6%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)52%
- Extreme weather32%
- Air traffic control & airport congestion16%
- Security0%
AUS to IAH: common questions
- How often are AUS to IAH flights on time?
- 76% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Austin to Houston cancelled?
- 1.2% of scheduled flights were cancelled (31 of 2,695).
- How long are typical delays?
- Across all flights the average arrival delay was 15 min (early arrivals count as zero). Flights that were late arrived 58 min behind schedule on average, and 5.8% of flights were an hour or more late.
- How long is taxi time at AUS?
- Flights on this route spent 23 min taxiing from the gate to takeoff on average.
Related routes
Return trip: IAH to AUS — 80% on time
More flights from Austin
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: AUS → IAH, nonstop flights by US airlines that report to the DOT. How we calculate this.