Flight OddsAA3309 BOS → ORD
American Airlines · Boston, MA to Chicago, IL · 35 flights observed, 2025-07-01 to 2025-08-05 · 867 mi
AA3309 covers more than one route in the data window — the stats below are for BOS → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
72%
Median delay
+5 min
90th percentile
+57 min
Cancellation rate
0%
How often is AA3309 on time?
Across 35 flights on BOS → ORD from 2025-07-01 to 2025-08-05, AA3309 arrived within 15 minutes of schedule 72% of the time. The median arrival delay was +5 min, and the worst 10% of flights arrived +57 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 | 23 | 72% |
| 16-30 min | 2 | 6% |
| 31-60 min | 4 | 13% |
| 61-120 min | 1 | 3% |
| 2+ hrs | 2 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 27 | 70% | +25 min |
| 2025-08 | 5 | 80% | +16 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 100% |
| Tue | 6 | 100% |
| Wed | 4 | 75% |
| Thu | 4 | 0% |
| Fri | 4 | 75% |
| Sat | 5 | 80% |
| Sun | 4 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…