Historical on-time performance
St. Louis to Des Moines
Flights on STL–DSM arrive on time 81% of the time over the last 12 months.
based on 508 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time81%Medianon timep9035 minCancel0.4%Flights508
Why flights run late
Delay causes
- Airline25%
- Weather2%
- Air traffic (NAS)10%
- Late aircraft63%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline50%
- Weather0%
- Air traffic (NAS)50%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 2 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 → DSM
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 69% to 89% on time.
- Middays89% on time · p90 15 min · 733 flights
- Mornings88% on time · p90 15 min · 238 flights
- Overnights69% on time · p90 50 min · 881 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 82% on time.
- Wednesdays82% on time · p90 30 min · 288 flights
- Tuesdays82% on time · p90 30 min · 288 flights
- Mondays82% on time · p90 30 min · 288 flights
- Saturdays81% on time · p90 25 min · 157 flights · limited
- Fridays77% on time · p90 35 min · 286 flights
- Thursdays76% on time · p90 35 min · 285 flights
- Sundays74% on time · p90 40 min · 285 flights
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