Flight Reliability
AA 581 · American Airlines
Miami → Chicago (MIA–ORD)
87
Pretty Reliable
WanderNerd Reliability Score
- 86%
- Arrive within 15 minutes
- 2 min early
- Average arrival delay
- 0.6%
- Cancelled
- 12 min early
- Median arrival delay
Based on 179 historical flights. Data through May 2026.
What the data says
The 6–9 AM departure wins.
AA 581 departing between 6–9 AM arrived on time 89% of the time, versus 50% between 9 AM–12 PM.
Skip Monday if you can.
AA 581 arrived on time 91% of the time on Saturdays. On Mondays: 83%.
Better than the MIA–ORD route average.
AA 581 arrived on time 86% of the time, versus 72% across the MIA–ORD route.
Better than the American Airlines network average.
AA 581 arrived on time 86% of the time, versus 77% across the American Airlines network.
The breakdown
- Mon83%(23 flights)
- Tue83%(29 flights)
- Wed83%(30 flights)
- Thu84%(25 flights)
- Fri88%(24 flights)
- Sat91%(23 flights)
- Sun91%(22 flights)
- 6–9 AM89%(162 flights)
- 9 AM–12 PM50%(14 flights)
83%
May
Jun 97% → May 83% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 97% | 30 |
| July 2025 | 80% | 30 |
| August 2025 | 97% | 30 |
| September 2025 | 83% | 29 |
| October 2025 | 90% | 31 |
| May 2026 | 83% | 18 |
- Departures on time
- 87%
- Diverted
- 1.1%
- Flights flown
- 176
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 179 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.