AUS to IAH flight delays
Austin, TX (AUS) Houston, TX (IAH) · 140 miles
201 flights · March 2025 – August 2026 · US Bureau of Transportation Statistics
68%
Arrived on time
Within 15 minutes of schedule
0%
Cancelled
Share of scheduled flights
60 min
When late, late by
Average across delayed arrivals
20 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The two directions do not behave alike. IAH to AUS arrives on time 5.1 points more often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
Flights from Austin to Houston run late more often than the average route, though not severely.
Only United Airlines flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
This is a thin route — 201 flights across the whole period. On a route this infrequent a cancellation is far more costly than the rate suggests, because the next departure may not be the same day.
Which airline should you fly on this route?
Over March 2025 – August 2026, United Airlines arrived on time most often on AUS to IAH.
Every airline on AUS to IAH
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| United Airlines | 201 | 68% | 0% | 60 min | D |
The return leg
IAH to AUS Houston back to Austin 73.13% on time COther routes from Austin
Common questions
Are flights from Austin to Houston usually delayed?
68% of flights on the AUS to IAH route arrived within 15 minutes of schedule, so roughly 3 in every ten arrived late. That is worse than the average route in this record.
Which airlines fly from Austin to Houston?
Only United Airlines appears in the published record on this route, with 201 flights and 68% arriving on time.
How often are AUS to IAH flights cancelled?
0% of scheduled flights did not operate — about 1 in every thousand. That is in the normal range.
When AUS to IAH flights are late, how late are they?
About 60 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on AUS to IAH during March 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →