STL (St. Louis) to DTW (Detroit) flights arrive on time 87% of the time. The most reliable airline on this route is SkyWest Airlines at 100%. The average delay is 95 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated March 2026.STL → DTW
STL (St. Louis) to DTW (Detroit)
STL → DTW on-time performance by month
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This route is usually on time. About 87% of flights arrive on schedule.
Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Accurate?
SkyWest Airlines is significantly more reliable on this route at 100% on time vs Southwest Airlines at 82%.
Airline Comparison
SkyWest Airlines leads at 100% on time; Southwest Airlines trails at 82%.
Accurate?
Good to know
Departing from STL
81% on timeTSA is currently ~20 min. Best time: 4 AM (about 5 min).
Arriving at DTW
84% on timeWhen flights into DTW are late, the average delay is 75 minutes. Build buffer if you have ground plans.
If connecting at DTW: TSA is ~8 min right now. Allow at least 60 minutes for a domestic connection.
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Data last updated March 2026. Source: Bureau of Transportation Statistics.