STL (St. Louis) to DTW (Detroit) flights arrive on time 85% of the time. The most reliable airline on this route is Delta Air Lines at 89%. The average delay is 97 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated August 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 85% of flights arrive on schedule.
Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Accurate?
Delta Air Lines is significantly more reliable on this route at 89% on time vs SkyWest Airlines at 74%.
Airline Comparison
Delta Air Lines leads at 89% on time; SkyWest Airlines trails at 74%.
Accurate?
Good to know
Departing from STL
81% on timeTSA is currently ~5 min. Best time: 4 AM (about 5 min).
Arriving at DTW
80% on timeWhen flights into DTW are late, the average delay is 78 minutes. Build buffer if you have ground plans.
If connecting at DTW: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what Delta Air Lines owes you — refund rights, action plan, complaint email. Free.
Flying out of STL? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Know someone flying soon?
Send them the link — delay data, TSA waits, weather, all free.
Data last updated August 2026. Source: Bureau of Transportation Statistics.