Best Time to Fly DTW to SDF: On-Time Stats by Hour & Airline
Detroit Metro Wayne County → Louisville Muhammad Ali International
Data through July 2026 · Last updated October 18, 2026
1,128 flights were scheduled from Detroit (DTW) to Louisville (SDF) in the last 12 months, and 78.5% of those that flew arrived on time, 0.9 points above the US average of 77.6%.
Among 2 airlines, Republic Airways led with 80.2% on time and SkyWest Airlines was last with 77.8%.
Over 24 months, Saturday was the most reliable day (85% on time) and January the worst month (71%).
The cancellation rate was 1.2% (US average 1.8%).
DTW to SDF on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airways | 80.2% | 90 min | 1.0% | 408 |
| SkyWest Airlines | 77.8% | 83 min | 1.4% | 699 |
| Spirit Airlines | Limited data | 10 | ||
| Delta Air Lines | Limited data | 11 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DTW to SDF
On-time arrival % by scheduled departure hour (local time), 2,401 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | Limited data | 2 | |
| 8am–9am | 82.9% | 0.8% | 601 |
| 10am–11am | 85.4% | 1.4% | 139 |
| 11am–12pm | Limited data | 12 | |
| 12pm–1pm | 81.8% | 0.7% | 287 |
| 1pm–2pm | 79.2% | 1.4% | 73 |
| 2pm–3pm | Limited data | 4 | |
| 3pm–4pm | 73.8% | 1.2% | 166 |
| 4pm–5pm | 79.5% | 1.0% | 306 |
| 5pm–6pm | 69.3% | 1.0% | 102 |
| 6pm–7pm | Limited data | 6 | |
| 7pm–8pm | 76.9% | 1.1% | 368 |
| 8pm–9pm | 83.7% | 0.0% | 141 |
| 9pm–10pm | 88.5% | 1.6% | 194 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DTW to SDF
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 79.6% | -2.8 pts | 0.0% | 54 |
| Christmas & New Year (Dec 20 - Jan 3) | 75.3% | -7.1 pts | 1.3% | 78 |
| Summer peak (Jun 15 - Aug 15) | 74.1% | -8.3 pts | 1.5% | 404 |
| All other days | 82.4% | — | 0.9% | 1,865 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).