Flight Reliability
AA 437 · American Airlines
Las Vegas → Philadelphia (LAS–PHL)
82
Pretty Reliable
WanderNerd Reliability Score
- 86%
- Arrive within 15 minutes
- 6 min early
- Average arrival delay
- 2.4%
- Cancelled
- 17 min early
- Median arrival delay
Based on 206 historical flights. Data through May 2026.
What the data says
9 PM–12 AM has a slight edge.
Departures between 9 PM–12 AM arrived on time 87% of the time, against 82% between 9 AM–12 PM.
Friday is doing you no favors.
AA 437 arrived on time 100% of the time on Tuesdays and just 63% on Fridays. That gap is worth planning around.
A bit ahead of the LAS–PHL route.
AA 437 arrived on time 86% of the time, versus 83% across the LAS–PHL route.
Better than the American Airlines network average.
AA 437 arrived on time 86% of the time, versus 77% across the American Airlines network.
The breakdown
- Mon75%(28 flights)
- Tue100%(28 flights)
- Wed90%(30 flights)
- Thu96%(28 flights)
- Fri63%(30 flights)
- Sat96%(28 flights)
- Sun82%(28 flights)
- 9 AM–12 PM82%(33 flights)
- 9 PM–12 AM87%(167 flights)
90%
May
Jun 82% → May 90% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 82% | 27 |
| July 2025 | 71% | 28 |
| August 2025 | 90% | 29 |
| September 2025 | 87% | 30 |
| October 2025 | 87% | 31 |
| April 2026 | 96% | 24 |
| May 2026 | 90% | 30 |
- Departures on time
- 87%
- Diverted
- 0.5%
- Flights flown
- 200
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 206 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.