Historical on-time performance
St. Louis to Austin
722 miData through Dec 2025Source: 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 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights
based on 969 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 timep9040 minCancel0.7%Flights969
Why flights run late
Delay causes
- Airline23%
- Weather3%
- Air traffic (NAS)19%
- Late aircraft55%
- Security0%
Most delay minutes here are attributed to Late aircraft.
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 (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 66% to 88% on time.
- Mornings88% on time · p90 15 min · 306 flights
- Middays86% on time · p90 20 min · 946 flights
- Afternoons72% on time · p90 55 min · 586 flights
- Overnights71% on time · p90 50 min · 645 flights
- Evenings66% on time · p90 50 min · 466 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 82% on time.
- Tuesdays82% on time · p90 25 min · 418 flights
- Mondays80% on time · p90 35 min · 453 flights
- Wednesdays79% on time · p90 35 min · 417 flights
- Fridays77% on time · p90 40 min · 449 flights
- Saturdays77% on time · p90 35 min · 276 flights
- Thursdays72% on time · p90 45 min · 450 flights
- Sundays72% on time · p90 50 min · 486 flights
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