PlainFlights

Route · STL → AUS · 2020–2025 BTS data

St. Louis to Austin

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), STL to AUS (St. Louis to Austin) ranks #2170 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

80.4%
On-time
+1.4 pts
vs US avg
59 min
Delay when late
5,770
Flights
#2170 of 4927
Corpus placement

Cancelled

0.6%

Best Month

Oct 2024 92%

Worst Month

Jul 2024 65%

Distance

721 mi

Carriers

3

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 91 27 0 0 WN
Nov 2025 85 19 0 0 WN
Oct 2025 83 22 0 0 WN
Sep 2025 73 8 0 0 WN
Aug 2025 76 13 1 0 WN
Jul 2025 93 24 0 1 WN
Jun 2025 91 18 0 1 WN
May 2025 90 21 1 0 WN
Apr 2025 87 18 0 0 WN
Mar 2025 78 14 1 1 WN
Feb 2025 60 12 0 0 WN
Jan 2025 62 11 4 0 WN
Dec 2024 77 9 0 0 WN
Nov 2024 77 11 0 0 WN
Oct 2024 87 7 1 0 WN
Sep 2024 73 6 0 0 WN
Aug 2024 76 15 0 0 WN
Jul 2024 89 31 0 0 WN
Jun 2024 86 23 0 0 WN
May 2024 91 29 0 1 WN
Apr 2024 83 15 0 0 WN
Mar 2024 62 17 0 0 WN
Feb 2024 37 5 0 0 WN
Jan 2024 45 11 3 0 WN

STL–AUS seasonal on-time pattern

Best: September (87.5%) · weakest: July (73.0%)

70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 80.1%

Strongest calendar month

September

87.5% on-time · ~81 flights/mo

Busiest calendar month

October

~92 flights/mo avg

Weakest calendar month

July

73.0% on-time · ~83 flights/mo

Cancellation Rate

0.6%

11 of 1,852 flights

Diversion Rate

0.2%

4 of 1,852 flights

Explore origin & destination

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

STL - St. Louis

Full on-time, delay-cause, and seasonal performance for St. Louis, MO.

STL 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 STL and AUS side by side on delays, cancellations, and reliability.

Compare STL vs AUS

Origin-hub reliability standing

Mid-pack among STL departures

From STL, this corridor sits with 45 other 75–85% on-time routes out of 51 tracked departures, not the hub's reliability leaders (5 at ≥85%) and not the softest ( 1 below 75%). Destination: Austin · fleet on-time rank #3003 of 4927.

What the Data Says About STL to AUS

5,770 tracked flights put the STL to AUS pairing (St. Louis to Austin) at a 80.4% on-time rate, squarely in line with the wider network. Delays that do occur run 58.7 minutes on average. Across the 721-mile route and its 3 carriers, the trailing 24 months show 0.6% cancelled and 0.2% diverted (1,852 flights sampled).

The monthly split is wide on this route: Oct 2024 posted the strongest performance at 92% on-time, while Jul 2024 came in at just 65% - a 27-point swing worth factoring into travel timing.

On the multi-year calendar, STL–AUS peaks in September at 87.5% on-time while October carries the heaviest traffic (~92 flights per month) ; the softest month is July at 73.0%, a 14.5-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does STL to AUS rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, STL to AUS ranks #2170 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 STL to AUS? ▼
Flights from St. Louis to Austin have a 80.4% on-time rate based on 5,770 flights. The average delay is 58.7 minutes. The best recent month was Oct 2024 with 92% on-time.
What is the cancellation rate for STL to AUS? ▼
Over the last 24 months, 0.6% of flights on this route were cancelled (11 of 1,852 flights) and 0.2% were diverted.
How far is the flight from STL to AUS? ▼
The flight distance from St. Louis (STL) to Austin (AUS) is approximately 721 miles. This route is served by 3 carriers.
When is the best time to fly from STL to AUS? ▼
The best recent month for on-time performance was Oct 2024 (92% on-time). The worst was Jul 2024 (65% on-time). Consider booking during months with historically better performance.

Airports on this route

STL Airport

St. Louis
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 STL–AUS data

STL–AUS is mid-pack at 80.4% on-time; month and carrier mix move more than the corridor headline.

  • Compare STL and AUS airport profiles: delay causes and top routes differ even on the same corridor. STL airport
  • If your dates flex, September (87.5% on-time) beats July (73.0%) on this corridor. Seasonal chart
  • 4 other routes post a similar 80.4% 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.