Flight Reliability
UA 1510 · United Airlines
Louisville → Denver (SDF–DEN)92% of its flights flew this route. The rest (DEN–PHL) are included in these numbers.
82
Pretty Reliable
WanderNerd Reliability Score
- 79%
- Arrive within 15 minutes
- 3 min
- Average arrival delay
- 1.0%
- Cancelled
- 10 min early
- Median arrival delay
Based on 396 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
UA 1510 arrived on time 91% of the time on Mondays and just 71% on Fridays. That gap is worth planning around.
A bit behind the SDF–DEN route.
UA 1510 arrived on time 79% of the time, versus 84% across the SDF–DEN route.
Trending in the right direction.
UA 1510 arrived on time 85% of the time over the last three months in the data, compared with 75% in the three months before that.
The breakdown
- Mon91%(55 flights)
- Tue82%(56 flights)
- Wed82%(56 flights)
- Thu77%(56 flights)
- Fri71%(56 flights)
- Sat73%(55 flights)
- Sun77%(57 flights)
76%
May
Jun 60% → May 76% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 60% | 30 |
| July 2025 | 71% | 31 |
| August 2025 | 71% | 31 |
| September 2025 | 87% | 30 |
| October 2025 | 90% | 31 |
| November 2025 | 93% | 29 |
| December 2025 | 73% | 30 |
| January 2026 | 79% | 29 |
| February 2026 | 71% | 28 |
| March 2026 | 90% | 30 |
| April 2026 | 90% | 30 |
| May 2026 | 76% | 62 |
- Departures on time
- 81%
- Diverted
- 0.3%
- Flights flown
- 391
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 396 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.