SDF (Louisville) to DTW (Detroit) flights arrive on time 85% of the time. The most reliable airline on this route is Spirit Airlines at 100%. The average delay is 90 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated August 2026.SDF → DTW
SDF (Louisville) to DTW (Detroit)
SDF → 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?
Spirit Airlines is significantly more reliable on this route at 100% on time vs Delta Air Lines at 70%.
Airline Comparison
Spirit Airlines leads at 100% on time; Delta Air Lines trails at 70%.
Accurate?
Good to know
Departing from SDF
81% on timeExpect ~18 min sitting on the taxiway after your gate pushes back. SDF has long runway queues.
TSA is currently ~17 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 ~23 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what Spirit Airlines owes you — refund rights, action plan, complaint email. Free.
Flying out of SDF? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
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Data last updated August 2026. Source: Bureau of Transportation Statistics.