63% of flights from Miami to Louisville arrived on time over the past 12 months. That is worse than the typical U.S. route. 16% of flights arrived more than an hour late or not at all.
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for MIA → SDF: when a flight was late, it was under 45 minutes late 48% of the time. About 1 in 7 flights landed an hour or more late, and 1 in 68 three hours or more; 1.5% were cancelled outright.
- On time or early63%
- 15–30 min late8.6%
- 30–60 min late13%
- 1–2 hours late9.1%
- 2–3 hours late3.7%
- 3+ hours late1.5%
- Diverted0.0%
- Cancelled1.5%
Share of all 408 scheduled flights, past 12 months, by arrival time against schedule.
By airline
| Airline | Flights | On time | Cancelled | Typical arrival | 1h+ late | Avg when late | Operated by |
|---|---|---|---|---|---|---|---|
| American Airlines | 408 | 63% | 1.5% | +1 min | 14.2% | +79 min | American Airlines 90%, Envoy 8%, Republic Airways 3% |
Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.
By month
Each calendar month pooled over 2023–2026. Best: February (76%). Worst: July (51%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 59 | — | — |
| Tuesday | 53 | — | — |
| Wednesday | 52 | — | — |
| Thursday | 53 | — | — |
| Friday | 58 | — | — |
| Saturday | 73 | — | — |
| Sunday | 60 | — | — |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: weather 6
Month by month
Not enough months with data to draw a trend.
Flight numbers on this route
Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.
| Flight | Departs | Flights | On time | Cancelled | Typical arrival | Operated by |
|---|---|---|---|---|---|---|
| AA 647 | 9:05 p.m. | 171 | 51% | 0.6% | +12 min | American Airlines |
Worst days in the past year
| Date | Flights | On time | Cancelled |
|---|---|---|---|
| May 3, 2026 | 4 | 50% | 0 |
Questions
How often are flights from MIA to SDF on time?
63% of 408 scheduled flights from Miami, FL to Louisville, KY arrived within 15 minutes of schedule between September 2025 and August 2026. 1.5% were cancelled.
What month has the most delays from MIA to SDF?
July (51% on time). The best month is February (76%), over 2023–2026.
Related
- SDF → MIA (return)
- Miami (MIA) delays by hour
- Flights into Louisville Muhammad Ali (SDF)
- American Airlines on-time record
- Connecting off this flight? Check the risk
Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.