Historical on-time performance
St. Louis to Des Moines
260 miData through Dec 2025Source: US DOT · BTS
Flights on STL–DSM arrive on time 81% of the time over the last 12 months.
On-time rate81%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled1.0%of scheduled flights
based on 678 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 minCancel1.0%Flights678
Why flights run late
Delay causes
- Airline34%
- Weather4%
- Air traffic (NAS)8%
- Late aircraft54%
- 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 STL → DSM
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 66% to 89% on time.
- Middays89% on time · p90 15 min · 824 flights
- Mornings88% on time · p90 15 min · 209 flights
- Overnights66% on time · p90 55 min · 961 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 73% to 81% on time.
- Wednesdays81% on time · p90 30 min · 314 flights
- Tuesdays81% on time · p90 30 min · 314 flights
- Mondays81% on time · p90 35 min · 314 flights
- Saturdays80% on time · p90 25 min · 168 flights · limited
- Thursdays75% on time · p90 40 min · 309 flights
- Fridays75% on time · p90 35 min · 310 flights
- Sundays73% on time · p90 40 min · 297 flights
Advertisement
Keep exploring