Best Time to Fly LAS to SDF: On-Time Stats by Hour & Airline
Harry Reid International → Louisville Muhammad Ali International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 70.1% of Las Vegas (LAS) to Louisville (SDF) flights arrived on time (399 scheduled flights). That is 7.5 points below the national average of 77.6%.
Among 2 airlines, Spirit Airlines led with 90.9% on time and Southwest Airlines was last with 68.1%.
Over 24 months, Wednesday was the most reliable day (86% on time) and June the worst month (49%).
The cancellation rate was 1.0% (US average 1.8%).
LAS to SDF on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Spirit Airlines | 90.9% | 58 min | 0.0% | 33 |
| Southwest Airlines | 68.1% | 56 min | 1.1% | 365 |
| American Airlines | Limited data | 1 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly LAS to SDF
On-time arrival % by scheduled departure hour (local time), 827 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 97.1% | 2.8% | 36 |
| 8am–9am | 85.7% | 0.0% | 42 |
| 9am–10am | 91.1% | 0.0% | 168 |
| 10am–11am | 75.4% | 0.0% | 57 |
| 11am–12pm | 76.5% | 1.9% | 52 |
| 12pm–1pm | 73.9% | 0.0% | 46 |
| 1pm–2pm | Limited data | 3 | |
| 2pm–3pm | 65.9% | 0.0% | 44 |
| 3pm–4pm | Limited data | 2 | |
| 4pm–5pm | 66.3% | 1.1% | 93 |
| 5pm–6pm | 63.0% | 1.6% | 192 |
| 6pm–7pm | 53.3% | 0.0% | 92 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on LAS to SDF
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 12 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 50.0% | -28.0 pts | 0.0% | 30 |
| Summer peak (Jun 15 - Aug 15) | 54.5% | -23.5 pts | 0.8% | 133 |
| All other days | 78.0% | — | 0.8% | 652 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).