Historical on-time performance
Austin to St. Louis
722 miData through May 2026Source: US DOT · BTS
Flights on AUS–STL arrive on time 79% of the time over the last 12 months.
On-time rate79%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.1%of scheduled flights
based on 982 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time79%Medianon timep9030 minCancel0.1%Flights982
Why flights run late
Delay causes
- Airline27%
- Weather1%
- Air traffic (NAS)9%
- Late aircraft63%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather100%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 1 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly AUS → STL
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 95% on time.
- Mornings95% on time · p90 on time · 1,031 flights
- Middays80% on time · p90 30 min · 734 flights
- Afternoons73% on time · p90 40 min · 752 flights
- Evenings64% on time · p90 65 min · 286 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 76% to 87% on time.
- Tuesdays87% on time · p90 20 min · 397 flights
- Saturdays86% on time · p90 20 min · 281 flights
- Wednesdays84% on time · p90 25 min · 396 flights
- Mondays82% on time · p90 20 min · 422 flights
- Thursdays81% on time · p90 25 min · 430 flights
- Fridays78% on time · p90 30 min · 430 flights
- Sundays76% on time · p90 40 min · 478 flights
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