ATL to SDF flight delays
Atlanta, GA (ATL) Louisville, KY (SDF) · 321 miles
2,707 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
84.89%
Arrived on time
Within 15 minutes of schedule
1.51%
Cancelled
Share of scheduled flights
64 min
When late, late by
Average across delayed arrivals
11 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The two directions do not behave alike. SDF to ATL arrives on time 5.1 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.
Only Delta Air Lines flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
Flights from Atlanta to Louisville keep to schedule more reliably than most. On a route this punctual the day you fly matters more than the airline you pick.
Which airline should you fly on this route?
Over January 2025 – August 2026, Delta Air Lines arrived on time most often on ATL to SDF. Flights ran closest to schedule in September and worst in March.
Every airline on ATL 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 |
|---|---|---|---|---|---|
| Delta Air Lines | 2,705 | 84.91% | 1.52% | 64 min | B |
| Spirit Airlines | 2 | 50% | 0% | 42 min | — |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
SDF to ATL Louisville back to Atlanta 90% on time AOther routes from Atlanta
Common questions
Are flights from Atlanta to Louisville usually delayed?
84.89% of flights on the ATL to SDF route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is better than the average route in this record.
Which airlines fly from Atlanta to Louisville?
Only Delta Air Lines appears in the published record on this route, with 2,705 flights and 84.91% arriving on time.
How often are ATL to SDF flights cancelled?
1.51% of scheduled flights did not operate — about 15 in every thousand. That is in the normal range.
What is the best month to fly Atlanta to Louisville?
September, when 93.7% of flights arrived on time. The worst was March at 78.6%.
When ATL to SDF flights are late, how late are they?
About 64 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 ATL 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 →