Which airline is most reliable for DTW (Detroit) to SDF (Louisville)?

The most reliable airline on the DTW to SDF route is Spirit Airlines, with an on-time arrival rate of 100%.

How often are flights delayed from DTW to SDF?

About 19% of flights from DTW to SDF experience delays. 81% arrive on time.

What's the average delay on DTW to SDF flights?

When flights from DTW to SDF are delayed, the average delay is approximately 69 minutes.

Is a short connection safe after a DTW to SDF flight?

With 81% of DTW to SDF flights arriving on time and an average delay of 69 minutes when late, a connection under 60 minutes at SDF is risky. We recommend at least 75-90 minutes for domestic connections after this route.

DTW → SDF

DTW (Detroit) to SDF (Louisville)

DTW (Detroit) to SDF (Louisville) flights arrive on time 81% of the time. The most reliable airline on this route is Spirit Airlines at 100%. The average delay is 69 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Source: Bureau of Transportation Statistics. Updated August 2026.

DTW → SDF on-time performance by month

JanFebMarAprMayJunJulAugSepOctNovDec

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This route is on time most of the time. About 81% 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 40%.

Airline Comparison

Spirit Airlines leads at 100% on time; Delta Air Lines trails at 40%.

Accurate?

Good to know

Departing from DTW

80% on time

Expect ~18 min sitting on the taxiway after your gate pushes back. DTW has long runway queues.

TSA is currently ~5 min. Best time: 4 AM (about 5 min).

More about DTW →

Arriving at SDF

81% on time

When flights into SDF are late, the average delay is 76 minutes. Build buffer if you have ground plans.

If connecting at SDF: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.

More about SDF →Connection times at SDF →

Flight cancelled or delayed?

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DTW Airport SDF Airport

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Data last updated August 2026. Source: Bureau of Transportation Statistics.