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Route Reliability

St. Louis → Austin

STL–AUS · 721 miles · St. Louis Lambert International Airport to Austin–Bergstrom International Airport

84
Pretty Reliable
WanderNerd Reliability Score
79%
Arrive within 15 minutes
5 min
Average arrival delay
0.4%
Cancelled
981
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 79% of the time across 981 flights. No comparison to make.

What the data says

Morning-you made the right choice.

STL–AUS flights departing between 6–9 AM arrived on time 92% of the time, versus 66% between 9 PM–12 AM.

Sunday scaries are real for this one.

STL–AUS flights arrived on time 85% of the time on Wednesdays. On Sundays: 71%.

Slipping a little lately.

STL–AUS flights arrived on time 77% of the time over the last three months in the data, compared with 81% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon80%(149 flights)
  • Tue83%(138 flights)
  • Wed85%(137 flights)
  • Thu81%(148 flights)
  • Fri78%(150 flights)
  • Sat76%(88 flights)
  • Sun71%(164 flights)
On-time by departure window
  • 6–9 AM92%(118 flights)
  • 9 AM–12 PM90%(243 flights)
  • 12–3 PM72%(186 flights)
  • 3–6 PM78%(123 flights)
  • 6–9 PM78%(115 flights)
  • 9 PM–12 AM66%(189 flights)
On-time trend by month
67%
May

Jun 81% → May 67% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202581%90
July 202575%92
August 202584%75
September 202589%73
October 202574%83
November 202578%85
December 202573%91
January 202690%61
February 202681%59
March 202684%85
April 202681%89
May 202667%91

Keep nerding

Based on 981 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.