Historical on-time performance
Houston to St. Louis
Flights on IAH–STL arrive on time 71% of the time over the last 12 months.
based on 322 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time71%Medianon timep9050 minCancel0.9%Flights322
Why flights run late
Delay causes
- Airline32%
- Weather5%
- Air traffic (NAS)12%
- Late aircraft51%
- 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 3 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 IAH → STL
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 79% on time.
- Mornings79% on time · p90 45 min · 104 flights · limited
- Middays79% on time · p90 40 min · 149 flights · limited
- Afternoons73% on time · p90 65 min · 660 flights
- Evenings73% on time · p90 40 min · 320 flights
- Overnights67% on time · p90 75 min · 697 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 66% to 78% on time.
- Tuesdays78% on time · p90 35 min · 264 flights
- Saturdays73% on time · p90 65 min · 243 flights
- Sundays72% on time · p90 55 min · 296 flights
- Wednesdays72% on time · p90 50 min · 284 flights
- Fridays72% on time · p90 75 min · 272 flights
- Mondays68% on time · p90 70 min · 282 flights
- Thursdays66% on time · p90 75 min · 289 flights
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