Flight OddsAA4391 BOS → ORD
American Airlines · Boston, MA to Chicago, IL · 10 flights observed, 2025-11-20 to 2025-12-01 · 867 mi
AA4391 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
60%
Median delay
-14 min
90th percentile
+131 min
Cancellation rate
0%
How often is AA4391 on time?
Across 10 flights on BOS → ORD from 2025-11-20 to 2025-12-01, AA4391 arrived within 15 minutes of schedule 60% of the time. The median arrival delay was -14 min, and the worst 10% of flights arrived +131 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 | 6 | 60% |
| 16-30 min | 0 | 0% |
| 31-60 min | 0 | 0% |
| 61-120 min | 3 | 30% |
| 2+ hrs | 1 | 10% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 9 | 67% | +43 min |
| 2025-12 | 1 | 0% | +107 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 2 | 50% |
| Tue | 1 | 100% |
| Wed | 1 | 0% |
| Thu | 1 | 100% |
| Fri | 1 | 100% |
| Sat | 2 | 50% |
| Sun | 2 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…