Historical on-time performance
St. Louis to Austin
721 miData through May 2026Source: US DOT · BTS
Flights on STL–AUS arrive on time 78% of the time over the last 12 months.
On-time rate78%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.4%of scheduled flights
based on 981 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time78%Medianon timep9035 minCancel0.4%Flights981
Why flights run late
Delay causes
- Airline23%
- Weather2%
- Air traffic (NAS)13%
- Late aircraft61%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather75%
- Air traffic (NAS)25%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 4 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 STL → AUS
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 67% to 88% on time.
- Mornings88% on time · p90 15 min · 349 flights
- Middays86% on time · p90 20 min · 929 flights
- Afternoons71% on time · p90 55 min · 576 flights
- Overnights70% on time · p90 50 min · 621 flights
- Evenings67% on time · p90 50 min · 332 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 71% to 81% on time.
- Wednesdays81% on time · p90 35 min · 387 flights
- Tuesdays81% on time · p90 30 min · 387 flights
- Mondays79% on time · p90 35 min · 425 flights
- Fridays77% on time · p90 45 min · 430 flights
- Saturdays76% on time · p90 35 min · 280 flights
- Thursdays76% on time · p90 35 min · 429 flights
- Sundays71% on time · p90 55 min · 469 flights
Keep exploring