Las Vegas (LAS) to Louisville (SDF): On-Time Performance
Data through July 2026
The calendar drives reliability on LAS–SDF. January 2025 flights landed on schedule 93% of the time, but June 2026 dropped to 47% — a gap of 47 points. Across the full period the route averages 73% on-time against a national 78%. Morning departures also hold up better than evening ones (87% vs 60%), which matters most in the rough months.
- On-time
- 73%
- arrived <15 min late
- Avg delay
- 16 min
- completed flights
- Cancelled
- 0.8%
- Flights/day
- 1.1
- last 12 months
- Duration
- 3h 39m
- scheduled
- Distance
- 1,624 mi
Best airline from LAS to SDF
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Spirit Airlinesmost reliable | 83% | 10 min | 0.9% | 106 |
| Southwest Airlines | 72% | 17 min | 0.8% | 769 |
Monthly on-time trend
Best time to fly from LAS to SDF
Aim for departures around 7 a.m. (97% on-time); avoid 6 p.m. departures (53%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 75% | 14 min |
| Tuesday | 75% | 16 min |
| Wednesdaybest | 85% | 10 min |
| Thursday | 67% | 20 min |
| Friday | 68% | 20 min |
| Saturday | 75% | 10 min |
| Sunday | 69% | 21 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft50%
- Airline operations38%
- National airspace system11%
- Weather2%
Frequently asked questions
- How often are flights from LAS to SDF delayed?
- 27% of LAS–SDF flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 16 minutes.
- Which airline is most reliable from LAS to SDF?
- Spirit Airlines has the best on-time record on this route at 83%, based on 106 flights. 2 airlines flew LAS–SDF frequently enough to compare in this period.
- What is the best time of day to fly from LAS to SDF?
- Departures around 7 a.m. have the best record (97% on-time), while departures around 6 p.m. have the worst (53%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from LAS to SDF?
- The scheduled LAS–SDF flight time averages 3h 39m over 1,624 miles. Actual arrival times vary — flights on this route land 15+ minutes late 27% of the time.
- How often are LAS to SDF flights cancelled?
- 0.8% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from LAS to SDF?
- June 2026 was the roughest month in this dataset, with only 47% of arrivals on time. The best was January 2025 at 93%. If your dates are flexible, that 47-point gap is worth planning around.
Explore related pages
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Based on 876 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.