Route Reliability
Louisville → Denver
SDF–DEN · 1,024 miles · Louisville Muhammad Ali International Airport to Denver International Airport
- 84%
- Arrive within 15 minutes
- 2 min
- Average arrival delay
- 1.1%
- Cancelled
- 1,107
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines85%731 flights
- 2.Southwest Airlines80%376 flights
What the data says
Morning-you made the right choice.
SDF–DEN flights departing between 3–6 AM arrived on time 97% of the time, versus 54% between 6–9 PM.
Friday is doing you no favors.
SDF–DEN flights arrived on time 90% of the time on Wednesdays. On Fridays: 79%.
United Airlines has a slight edge here.
United Airlines arrived on time 85% of the time on this route; Southwest Airlines managed 80%.
Ticking up lately.
SDF–DEN flights arrived on time 85% of the time over the last three months in the data, compared with 80% in the three months before that.
Flights on this route
The breakdown
- Mon84%(153 flights)
- Tue86%(156 flights)
- Wed90%(153 flights)
- Thu80%(157 flights)
- Fri79%(155 flights)
- Sat86%(153 flights)
- Sun81%(167 flights)
- 3–6 AM97%(37 flights)
- 6–9 AM95%(273 flights)
- 9 AM–12 PM89%(222 flights)
- 12–3 PM82%(74 flights)
- 3–6 PM77%(427 flights)
- 6–9 PM54%(61 flights)
Jun 74% → May 84% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 74% | 92 |
| July 2025 | 83% | 97 |
| August 2025 | 81% | 94 |
| September 2025 | 92% | 90 |
| October 2025 | 85% | 93 |
| November 2025 | 93% | 87 |
| December 2025 | 71% | 92 |
| January 2026 | 89% | 87 |
| February 2026 | 81% | 84 |
| March 2026 | 83% | 92 |
| April 2026 | 88% | 91 |
| May 2026 | 84% | 95 |
Keep nerding
Based on 1,107 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.