MIA to SDF flight delays
Miami, FL (MIA) Louisville, KY (SDF) · 910 miles
429 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
67.22%
Arrived on time
Within 15 minutes of schedule
1.17%
Cancelled
Share of scheduled flights
76 min
When late, late by
Average across delayed arrivals
26 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In January it ran 32.2 points more punctual than in October — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The two directions do not behave alike. SDF to MIA arrives on time 14.7 points more often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
This is a late route. Flights from Miami to Louisville miss their scheduled arrival often enough that a tight connection at the far end is a connection at risk.
This route does worse than its own airport. MIA as a whole runs 7 points more punctual than these flights, which points at something specific to the route — the time of day it is scheduled, or the aircraft that feed it — rather than the airport.
Which airline should you fly on this route?
Over January 2025 – August 2026, American Airlines arrived on time most often on MIA to SDF. Flights ran closest to schedule in January and worst in October.
Every airline on MIA to SDF
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| American Airlines | 368 | 64.29% | 1.09% | 67 min | F |
| Envoy Air | 46 | 86.67% | 2.17% | 63 min | — |
| Republic Airways | 15 | 80% | 0% | 490 min | — |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
SDF to MIA Louisville back to Miami 81.95% on time COther routes from Miami
Common questions
Are flights from Miami to Louisville usually delayed?
67.22% of flights on the MIA to SDF route arrived within 15 minutes of schedule, so roughly 3 in every ten arrived late. That is worse than the average route in this record.
Which airlines fly from Miami to Louisville?
Only American Airlines appears in the published record on this route, with 368 flights and 64.29% arriving on time.
How often are MIA to SDF flights cancelled?
1.17% of scheduled flights did not operate — about 12 in every thousand. That is in the normal range.
What is the best month to fly Miami to Louisville?
January, when 83.8% of flights arrived on time. The worst was October at 51.6%.
When MIA to SDF flights are late, how late are they?
About 76 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on MIA to SDF during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →