Flight Reliability
AA 3640 · American Airlines
GSO → Miami (GSO–MIA)
93
Nerd Approved
WanderNerd Reliability Score
- 91%
- Arrive within 15 minutes
- 2 min early
- Average arrival delay
- 0.8%
- Cancelled
- 9 min early
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Monday is the weak spot.
AA 3640 arrived on time 96% of the time on Sundays. On Mondays: 86%.
Better than the American Airlines network average.
AA 3640 arrived on time 91% of the time, versus 77% across the American Airlines network.
Trending in the right direction.
AA 3640 arrived on time 94% of the time over the last three months in the data, compared with 84% in the three months before that.
The breakdown
- Mon86%(51 flights)
- Tue89%(52 flights)
- Wed90%(51 flights)
- Thu90%(52 flights)
- Fri92%(52 flights)
- Sat90%(51 flights)
- Sun96%(51 flights)
100%
May
Jun 93% → May 100% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 93% | 30 |
| July 2025 | 87% | 31 |
| August 2025 | 90% | 30 |
| September 2025 | 100% | 30 |
| October 2025 | 90% | 31 |
| November 2025 | 93% | 30 |
| December 2025 | 84% | 31 |
| January 2026 | 82% | 28 |
| February 2026 | 85% | 27 |
| March 2026 | 84% | 31 |
| April 2026 | 97% | 30 |
| May 2026 | 100% | 31 |
- Departures on time
- 96%
- Diverted
- 0.5%
- Flights flown
- 360
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 365 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.