Route on-time record
MIA to SDF: most on-time flights and the best time to fly
Miami (Miami International Airport) to Louisville (Louisville Muhammad Ali International Airport). 429 nonstop flights in Jun 2025 to May 2026, 68% arrived within 15 minutes and 1.6% were cancelled. The most reliable flight number was American 647 at 9:14 PM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
MIA → SDF
Miami to Louisville: 429 nonstop flights a year
On time (12 months)
68%
Cancelled
1.6%
avg delay 23 min
Best time to leave
Noon to 3 PM
83% on time vs 66% after 9 PM
Most reliable airline
American
65% chance on time
Lowest nonstop fare seen in the next two months: $247 (American 1650 on 2026-11-20). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · American 647
9:14 PM → 11:59 PM2h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31.
63%
chance on time
- On time (history)
- 62%
- Cancelled
- 1.4%
- Avg arrival delay
- 25 min
- Arrived on time 62% of the time (146 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (After 9 PM: 66% on time; Noon to 3 PM: 83%).
- Departs outside MIA's trouble window (1 PM to 7 PM, when 49% of its 45 ground stops and delay programs started).
Moderate track record · 146 flights
Find American 647 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- American Airlines65%
368 flights · 65% on time as flown · 1.6% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Noon to 3 PM83%
30 flights · avg delay 19 min
- After 9 PM66%
365 flights · avg delay 24 min
Best day: Tuesday (76%). Worst: Sunday (63%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Late-arriving aircraft43%
- Airline (crew, maintenance, boarding)33%
- Air traffic control and airport volume16%
- Severe weather7%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
MIA to SDF questions
- What time of day is best to fly MIA to SDF?
- Noon to 3 PM: 83% of flights arrived on time, against 66% for departures after 9 PM.
- Which airline is most on time from MIA to SDF?
- American, with a season-adjusted 65% chance of operating and arriving on time over 368 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on MIA to SDF?
- June (53% on time); the best was November (81%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from MIA
- SDF to MIA (return)
- MIA to ATL 73%
- MIA to LGA 67%
- MIA to DFW 73%
- MIA to JFK 71%
- MIA to ORD 71%
- MIA to EWR 72%
- MIA to DCA 75%
- MIA to MCO 72%
- MIA to IAH 76%
- MIA to CLT 78%
- MIA to BOS 69%
- MIA to LAX 75%
Most on-time flights from MIA on every route →
Live status: FAA delays and ground stops