DSM (Des Moines) to STL (St. Louis) flights arrive on time 89% of the time. The most reliable airline on this route is Southwest Airlines at 89%. The average delay is 60 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated August 2026.DSM → STL
DSM (Des Moines) to STL (St. Louis)
DSM → STL on-time performance by month
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JanFebMarAprMayJunJulAugSepOctNovDec
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This route is usually on time. About 89% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Accurate?
Good to know
Departing from DSM
79% on timeExpect ~18 min sitting on the taxiway after your gate pushes back. DSM has long runway queues.
TSA is currently ~5 min. Best time: 4 AM (about 5 min).
Arriving at STL
81% on timeWhen flights into STL are late, the average delay is 66 minutes. Build buffer if you have ground plans.
If connecting at STL: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.
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Data last updated August 2026. Source: Bureau of Transportation Statistics.