Historical on-time performance
Pittsburgh to St. Louis
554 miData through Dec 2025Source: US DOT · BTS
Flights on PIT–STL arrive on time 84% of the time over the last 12 months.
On-time rate84%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights
based on 327 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time84%Medianon timep9025 minCancel0.0%Flights327
Why flights run late
Delay causes
- Airline18%
- Weather2%
- Air traffic (NAS)14%
- Late aircraft65%
- 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 PIT → STL
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 65% to 93% on time.
- Mornings93% on time · p90 10 min · 283 flights
- Middays89% on time · p90 15 min · 452 flights
- Afternoons86% on time · p90 15 min · 197 flights · limited
- Evenings66% on time · p90 55 min · 111 flights · limited
- Overnights65% on time · p90 65 min · 106 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 90% on time.
- Wednesdays90% on time · p90 10 min · 157 flights · limited
- Saturdays89% on time · p90 15 min · 138 flights · limited
- Thursdays89% on time · p90 15 min · 156 flights · limited
- Tuesdays89% on time · p90 15 min · 157 flights · limited
- Fridays87% on time · p90 20 min · 156 flights · limited
- Mondays85% on time · p90 20 min · 157 flights · limited
- Sundays72% on time · p90 55 min · 228 flights
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