Louisville (SDF) to Miami (MIA): On-Time Performance
Data through May 2026
When you fly SDF to MIA matters as much as anything else about the booking: the route swung from 95% on-time in May 2026 to just 61% in August 2025. Across the full period the route averages 81% on-time against a national 78%.
- On-time
- 81%
- arrived <15 min late
- Avg delay
- 26 min
- completed flights
- Cancelled
- 1.8%
- Flights/day
- 1.2
- last 12 months
- Duration
- 2h 38m
- scheduled
- Distance
- 910 mi
Best airline from SDF to MIA
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Envoy Airmost reliable | 82% | 10 min | 0.7% | 141 |
| American Airlines | 82% | 29 min | 2.1% | 668 |
Monthly on-time trend
Best time to fly from SDF to MIA
Aim for departures around 5 a.m. (87% on-time); avoid 12 p.m. departures (68%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 82% | 27 min |
| Tuesday | 79% | 19 min |
| Wednesdaybest | 85% | 10 min |
| Thursday | 84% | 26 min |
| Friday | 82% | 30 min |
| Saturday | 82% | 44 min |
| Sunday | 77% | 20 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft13%
- Airline operations76%
- National airspace system9%
- Weather2%
Frequently asked questions
- How often are flights from SDF to MIA delayed?
- 19% of SDF–MIA flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 26 minutes.
- Which airline is most reliable from SDF to MIA?
- Envoy Air has the best on-time record on this route at 82%, based on 141 flights. 2 airlines flew SDF–MIA frequently enough to compare in this period.
- What is the best time of day to fly from SDF to MIA?
- Departures around 5 a.m. have the best record (87% on-time), while departures around 12 p.m. have the worst (68%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SDF to MIA?
- The scheduled SDF–MIA flight time averages 2h 38m over 910 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are SDF to MIA flights cancelled?
- 1.8% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
- What is the worst month to fly from SDF to MIA?
- August 2025 was the roughest month in this dataset, with only 61% of arrivals on time. The best was May 2026 at 95%. If your dates are flexible, that 33-point gap is worth planning around.
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Based on 829 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.