Historical on-time performance
St. Louis to Houston
687 miData through May 2026Source: US DOT · BTS
Flights on STL–HOU arrive on time 79% of the time over the last 12 months.
On-time rate79%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.3%of scheduled flights
based on 1,546 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 timep9035 minCancel0.3%Flights1,546
Why flights run late
Delay causes
- Airline28%
- Weather4%
- Air traffic (NAS)14%
- Late aircraft55%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline60%
- Weather40%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 5 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 → HOU
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 — 90% on time.
- Mornings90% on time · p90 10 min · 1,631 flights
- Middays82% on time · p90 30 min · 850 flights
- Overnights69% on time · p90 60 min · 941 flights
- Afternoons68% on time · p90 55 min · 297 flights
- Evenings67% on time · p90 55 min · 856 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 83% on time.
- Tuesdays83% on time · p90 30 min · 628 flights
- Wednesdays83% on time · p90 30 min · 629 flights
- Saturdays80% on time · p90 30 min · 479 flights
- Fridays79% on time · p90 35 min · 714 flights
- Thursdays76% on time · p90 40 min · 704 flights
- Sundays76% on time · p90 45 min · 710 flights
- Mondays75% on time · p90 40 min · 711 flights
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