Flight OddsAmerican Airlines · Bloomington/Normal, IL to Chicago, IL · 28 flights observed, 2025-08-06 to 2025-09-02 · 116 mi
AA3521 covers more than one route in the data window — the stats below are for BMI → ORD, the one it has flown most recently. The others are linked under “Other routes”.
How often is AA3521 on time?
Across 28 flights on BMI → ORD from 2025-08-06 to 2025-09-02, AA3521 arrived within 15 minutes of schedule 93% of the time. The median arrival delay was -22 min, and the worst 10% of flights arrived +2 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 26 | 93% |
| 16-30 min | 0 | 0% |
| 31-60 min | 1 | 4% |
| 61-120 min | 1 | 4% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 26 | 92% | -13 min |
| 2025-09 | 2 | 100% | -31 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 100% |
| Tue | 4 | 75% |
| Wed | 4 | 100% |
| Thu | 4 | 100% |
| Fri | 4 | 100% |
| Sat | 4 | 100% |
| Sun | 4 | 75% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…