ATL to SDF flight delays & on-time performance
Nonstop flights from Hartsfield Jackson Atlanta International Airport to Louisville Muhammad Ali International Airport · 321 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ATL or SDF right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Atlanta (ATL) to Louisville (SDF) arrived on time 84% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 1.5% were cancelled, and 5% arrived an hour or more late.
- Delta Air Lines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 9am did best (92% on time); around 9pm did worst (78%).
- Wednesday was the most reliable day to fly (89% on time) and Sunday the least (77%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (47%).
Which airline is most on time from ATL to SDF?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Delta Air Lines | 84% | 1.5% | 11 min | 5.2% | 2,717 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am91%99 flights
- 8am90%264 flights
- 9am92%101 flights
- 10am88%345 flights
- 12pm90%91 flights
- 1pm83%207 flights
- 2pm78%69 flights
- 3pm81%293 flights
- 4pm78%67 flights
- 5pm82%274 flights
- 6pm84%52 flights
- 7pm79%262 flights
- 8pm83%72 flights
- 9pm78%153 flights
- 10pm87%273 flights
- 11pm79%83 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday83%1.2% cancelled
- Tuesday84%1.3% cancelled
- Wednesday89%0.0% cancelled
- Thursday87%0.0% cancelled
- Friday86%1.0% cancelled
- Saturday86%3.2% cancelled
- Sunday77%3.7% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)47%
- Late-arriving aircraft25%
- Air traffic control & airport congestion19%
- Extreme weather8%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)65%
- Extreme weather35%
- Air traffic control & airport congestion0%
- Security0%
ATL to SDF: common questions
- How often are ATL to SDF flights on time?
- 84% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Atlanta to Louisville cancelled?
- 1.5% of scheduled flights were cancelled (40 of 2,717).
- How long are typical delays?
- Across all flights the average arrival delay was 11 min (early arrivals count as zero). Flights that were late arrived 64 min behind schedule on average, and 5.2% of flights were an hour or more late.
- How long is taxi time at ATL?
- Flights on this route spent 15 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SDF to ATL — 90% on time
More flights from Atlanta
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ATL → SDF, nonstop flights by US airlines that report to the DOT. How we calculate this.