Historical on-time performance
Houston to St. Louis
687 miData through May 2026Source: US DOT · BTS
Flights on HOU–STL arrive on time 80% of the time over the last 12 months.
On-time rate80%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.3%of scheduled flights
based on 1,550 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time80%Medianon timep9030 minCancel0.3%Flights1,550
Why flights run late
Delay causes
- Airline32%
- Weather4%
- Air traffic (NAS)10%
- Late aircraft53%
- Security1%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline40%
- Weather40%
- Air traffic (NAS)20%
- 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 HOU → STL
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 — 93% on time.
- Mornings93% on time · p90 5 min · 1,761 flights
- Middays81% on time · p90 30 min · 574 flights
- Afternoons78% on time · p90 45 min · 638 flights
- Evenings75% on time · p90 45 min · 808 flights
- Overnights72% on time · p90 50 min · 782 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 79% to 85% on time.
- Saturdays85% on time · p90 20 min · 487 flights
- Tuesdays85% on time · p90 25 min · 630 flights
- Wednesdays83% on time · p90 30 min · 619 flights
- Fridays82% on time · p90 25 min · 714 flights
- Thursdays82% on time · p90 30 min · 700 flights
- Mondays82% on time · p90 25 min · 707 flights
- Sundays79% on time · p90 35 min · 706 flights
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