Miami (MIA) to Louisville (SDF): On-Time Performance
Data through May 2026
When you fly MIA to SDF matters as much as anything else about the booking: the route swung from 90% on-time in January 2025 to just 42% in June 2024. Across the full period the route averages 70% on-time against a national 78%.
- On-time
- 70%
- arrived <15 min late
- Avg delay
- 24 min
- completed flights
- Cancelled
- 1.4%
- Flights/day
- 1.2
- last 12 months
- Duration
- 2h 44m
- scheduled
- Distance
- 910 mi
Best airline from MIA to SDF
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Envoy Airmost reliable | 83% | 10 min | 0.7% | 139 |
| American Airlines | 67% | 27 min | 1.6% | 669 |
Monthly on-time trend
Best time to fly from MIA to SDF
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 67% | 26 min |
| Tuesdaybest | 77% | 20 min |
| Wednesday | 69% | 21 min |
| Thursday | 68% | 28 min |
| Friday | 74% | 24 min |
| Saturday | 70% | 20 min |
| Sunday | 65% | 30 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft41%
- Airline operations39%
- National airspace system13%
- Weather7%
Frequently asked questions
- How often are flights from MIA to SDF delayed?
- 30% of MIA–SDF flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 24 minutes.
- Which airline is most reliable from MIA to SDF?
- Envoy Air has the best on-time record on this route at 83%, based on 139 flights. 2 airlines flew MIA–SDF frequently enough to compare in this period.
- How long is the flight from MIA to SDF?
- The scheduled MIA–SDF flight time averages 2h 44m over 910 miles. Actual arrival times vary — flights on this route land 15+ minutes late 30% of the time.
- How often are MIA to SDF flights cancelled?
- 1.4% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from MIA to SDF?
- June 2024 was the roughest month in this dataset, with only 42% of arrivals on time. The best was January 2025 at 90%. If your dates are flexible, that 48-point gap is worth planning around.
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Based on 828 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.