Historical on-time performance
Houston to Austin
140 miData through May 2026Source: US DOT · BTS
Flights on IAH–AUS arrive on time 78% of the time over the last 12 months.
On-time rate78%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled1.0%of scheduled flights
based on 2,579 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time78%Medianon timep9045 minCancel1.0%Flights2,579
Why flights run late
Delay causes
- Airline31%
- Weather8%
- Air traffic (NAS)24%
- Late aircraft37%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline19%
- Weather63%
- Air traffic (NAS)19%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 27 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly IAH → AUS
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 87% on time.
- Mornings87% on time · p90 20 min · 1,252 flights
- Middays81% on time · p90 35 min · 991 flights
- Overnights72% on time · p90 60 min · 1,959 flights
- Afternoons71% on time · p90 65 min · 1,856 flights
- Evenings70% on time · p90 60 min · 1,244 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 80% on time.
- Tuesdays80% on time · p90 40 min · 1,024 flights
- Wednesdays78% on time · p90 40 min · 1,067 flights
- Mondays76% on time · p90 45 min · 1,089 flights
- Saturdays75% on time · p90 50 min · 917 flights
- Fridays75% on time · p90 60 min · 1,066 flights
- Thursdays73% on time · p90 55 min · 1,085 flights
- Sundays70% on time · p90 65 min · 1,054 flights
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