PlainFlights

Route · AUS → IAH · 2020–2025 BTS data

Austin to Houston

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), AUS to IAH (Austin to Houston) ranks #728 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

82.2%
On-time
+3.2 pts
vs US avg
74 min
Delay when late
13,659
Flights
#728 of 4927
Corpus placement

Cancelled

1.5%

Best Month

Feb 2024 89%

Worst Month

Oct 2025 62%

Distance

140 mi

Carriers

13

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 232 41 1 0 UA,OO
Nov 2025 221 71 3 0 UA
Oct 2025 237 90 0 0 UA
Sep 2025 237 54 1 0 UA,OO
Aug 2025 213 57 4 0 OO,UA
Jul 2025 188 54 2 0 OO,UA
Jun 2025 200 58 5 3 OO,UA
May 2025 234 53 7 0 OO,UA
Apr 2025 229 44 0 1 OO,UA
Mar 2025 235 35 0 0 OO,UA
Feb 2025 204 35 0 0 OO,UA
Jan 2025 207 26 12 0 OO,UA
Dec 2024 190 32 3 0 OO,UA
Nov 2024 214 35 3 0 OO,UA
Oct 2024 215 37 1 0 UA,OO
Sep 2024 187 25 0 0 OO,UA
Aug 2024 187 34 0 0 OO,UA
Jul 2024 193 53 14 0 OO,UA
Jun 2024 183 44 4 1 OO,UA
May 2024 165 45 6 0 OO,UA
Apr 2024 148 28 0 0 OO,UA
Mar 2024 194 31 1 1 OO,UA
Feb 2024 158 17 0 0 OO,UA
Jan 2024 159 34 7 0 UA

AUS–IAH seasonal on-time pattern

Best: December (86.1%) · weakest: July (76.1%)

75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 86.1%

Strongest calendar month

December

86.1% on-time · ~194 flights/mo

Busiest calendar month

March

~213 flights/mo avg

Weakest calendar month

July

76.1% on-time · ~186 flights/mo

Cancellation Rate

1.5%

74 of 4,830 flights

Diversion Rate

0.1%

6 of 4,830 flights

Explore origin & destination

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

AUS - Austin

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

AUS on-time profile

IAH - Houston

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

IAH on-time profile

Compare the two airports

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

Compare AUS vs IAH

Origin-hub reliability standing

Mid-pack among AUS departures

From AUS, this corridor sits with 45 other 75–85% on-time routes out of 55 tracked departures, not the hub's reliability leaders (3 at ≥85%) and not the softest ( 7 below 75%). Destination: Houston · fleet on-time rank #2252 of 4927.

What the Data Says About AUS to IAH

Bureau of Transportation Statistics records show Austin to Houston (AUS to IAH) running a 82.2% on-time rate over 13,659 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 73.7 minutes. The 140-mile corridor is served by 13 carriers, and over the last 24 months 1.5% of 4,830 flights were cancelled, 0.1% diverted.

The monthly split is wide on this route: Feb 2024 posted the strongest performance at 89% on-time, while Oct 2025 came in at just 62% - a 27-point swing worth factoring into travel timing.

On the multi-year calendar, AUS–IAH peaks in December at 86.1% on-time while March carries the heaviest traffic (~213 flights per month) ; the softest month is July at 76.1%, a 10.0-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does AUS to IAH rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, AUS to IAH ranks #728 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 AUS to IAH? ▼
Flights from Austin to Houston have a 82.2% on-time rate based on 13,659 flights. The average delay is 73.7 minutes. The best recent month was Feb 2024 with 89% on-time.
What is the cancellation rate for AUS to IAH? ▼
Over the last 24 months, 1.5% of flights on this route were cancelled (74 of 4,830 flights) and 0.1% were diverted.
How far is the flight from AUS to IAH? ▼
The flight distance from Austin (AUS) to Houston (IAH) is approximately 140 miles. This route is served by 13 carriers.
When is the best time to fly from AUS to IAH? ▼
The best recent month for on-time performance was Feb 2024 (89% on-time). The worst was Oct 2025 (62% on-time). Consider booking during months with historically better performance.

Airports on this route

AUS Airport

Austin
IAH Airport

Houston
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 AUS–IAH data

AUS–IAH runs 3.2 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare AUS and IAH airport profiles: delay causes and top routes differ even on the same corridor. AUS airport
  • If your dates flex, December (86.1% on-time) beats July (76.1%) on this corridor. Seasonal chart
  • 4 other routes post a similar 82.2% 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.