Miami (MIA) to Louisville (SDF): On-Time Performance
Data through July 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 33% in July 2026. Across the full period the route averages 69% on-time against a national 78%.
- On-time
- 69%
- arrived <15 min late
- Avg delay
- 26 min
- completed flights
- Cancelled
- 1.3%
- Flights/day
- 1.2
- last 12 months
- Duration
- 2h 43m
- scheduled
- Distance
- 910 mi
Best airline from MIA to SDF
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Envoy Airmost reliable | 86% | 8 min | 0.8% | 131 |
| American Airlines | 66% | 27 min | 1.4% | 705 |
Monthly on-time trend
Best time to fly from MIA to SDF
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 66% | 28 min |
| Tuesdaybest | 77% | 18 min |
| Wednesday | 68% | 22 min |
| Thursday | 66% | 27 min |
| Friday | 73% | 24 min |
| Saturday | 68% | 31 min |
| Sunday | 65% | 28 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 operations35%
- National airspace system13%
- Weather10%
Frequently asked questions
- How often are flights from MIA to SDF delayed?
- 31% of MIA–SDF flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 26 minutes.
- Which airline is most reliable from MIA to SDF?
- Envoy Air has the best on-time record on this route at 86%, based on 131 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 43m over 910 miles. Actual arrival times vary — flights on this route land 15+ minutes late 31% of the time.
- How often are MIA to SDF flights cancelled?
- 1.3% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from MIA to SDF?
- July 2026 was the roughest month in this dataset, with only 33% of arrivals on time. The best was January 2025 at 90%. If your dates are flexible, that 57-point gap is worth planning around.
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Based on 864 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.