PlainFlights

Route · IAH → AUS · 2020–2025 BTS data

Houston to Austin

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), IAH to AUS (Houston to Austin) ranks #727 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

79.1%
On-time
+0.1 pts
vs US avg
71 min
Delay when late
13,660
Flights
#727 of 4927
Corpus placement

Cancelled

1.2%

Best Month

Sep 2025 88%

Worst Month

May 2024 54%

Distance

140 mi

Carriers

14

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 231 46 0 0 UA,OO
Nov 2025 222 60 3 1 UA
Oct 2025 237 47 0 0 UA
Sep 2025 237 29 0 0 UA
Aug 2025 214 50 1 0 OO,UA
Jul 2025 188 65 1 0 OO,UA
Jun 2025 200 77 6 0 OO,UA
May 2025 235 64 6 0 OO,UA
Apr 2025 229 45 0 0 OO,UA
Mar 2025 236 51 0 1 OO,UA
Feb 2025 202 33 0 0 OO,UA
Jan 2025 205 36 11 0 OO,UA
Dec 2024 190 49 2 0 NK,OO,UA
Nov 2024 214 35 1 0 OO,UA
Oct 2024 216 43 0 0 UA,OO
Sep 2024 187 33 0 0 OO,UA
Aug 2024 189 49 0 0 NK,OO,UA
Jul 2024 193 82 10 0 OO,UA
Jun 2024 183 68 2 0 OO,UA
May 2024 165 76 6 0 OO,UA
Apr 2024 148 34 0 2 OO,UA
Mar 2024 194 45 2 0 OO,UA
Feb 2024 159 21 0 0 OO,UA
Jan 2024 157 37 7 0 UA

IAH–AUS seasonal on-time pattern

Best: February (83.9%) · weakest: June (69.2%)

65%70%75%80%85% JanFebMarAprMayJunJulAugSepOctNovDec 80.2%

Strongest calendar month

February

83.9% on-time · ~188 flights/mo

Busiest calendar month

March

~214 flights/mo avg

Weakest calendar month

June

69.2% on-time · ~176 flights/mo

Cancellation Rate

1.2%

58 of 4,831 flights

Diversion Rate

0.1%

4 of 4,831 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

IAH - Houston

Full on-time, delay-cause, and seasonal performance for Houston, TX.

IAH on-time profile

AUS - Austin

Full on-time, delay-cause, and seasonal performance for Austin, TX.

AUS on-time profile

Compare the two airports

See IAH and AUS side by side on delays, cancellations, and reliability.

Compare IAH vs AUS

Origin-hub reliability standing

Mid-pack among IAH departures

From IAH, this corridor sits with 79 other 75–85% on-time routes out of 102 tracked departures, not the hub's reliability leaders (17 at ≥85%) and not the softest ( 6 below 75%). Destination: Austin · fleet on-time rank #3487 of 4927.

What the Data Says About IAH to AUS

13,660 tracked flights put the IAH to AUS pairing (Houston to Austin) at a 79.1% on-time rate, squarely in line with the wider network. Delays that do occur run 70.6 minutes on average. Across the 140-mile route and its 14 carriers, the trailing 24 months show 1.2% cancelled and 0.1% diverted (4,831 flights sampled).

The monthly split is wide on this route: Sep 2025 posted the strongest performance at 88% on-time, while May 2024 came in at just 54% - a 34-point swing worth factoring into travel timing.

On the multi-year calendar, IAH–AUS peaks in February at 83.9% on-time while March carries the heaviest traffic (~214 flights per month) ; the softest month is June at 69.2%, a 14.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does IAH to AUS rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, IAH to AUS ranks #727 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from IAH to AUS? ▼
Flights from Houston to Austin have a 79.1% on-time rate based on 13,660 flights. The average delay is 70.6 minutes. The best recent month was Sep 2025 with 88% on-time.
What is the cancellation rate for IAH to AUS? ▼
Over the last 24 months, 1.2% of flights on this route were cancelled (58 of 4,831 flights) and 0.1% were diverted.
How far is the flight from IAH to AUS? ▼
The flight distance from Houston (IAH) to Austin (AUS) is approximately 140 miles. This route is served by 14 carriers.
When is the best time to fly from IAH to AUS? ▼
The best recent month for on-time performance was Sep 2025 (88% on-time). The worst was May 2024 (54% on-time). Consider booking during months with historically better performance.

Airports on this route

IAH Airport

Houston
AUS Airport

Austin
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using IAH–AUS data

IAH–AUS is mid-pack at 79.1% on-time; month and carrier mix move more than the corridor headline.

  • Compare IAH and AUS airport profiles: delay causes and top routes differ even on the same corridor. IAH airport
  • If your dates flex, February (83.9% on-time) beats June (69.2%) on this corridor. Seasonal chart
  • 4 other routes post a similar 79.1% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.