Flight OddsAA3691 BOS → ORD
American Airlines · Boston, MA to Chicago, IL · 45 flights observed, 2025-11-02 to 2025-12-17 · 867 mi
AA3691 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
70%
Median delay
-1 min
90th percentile
+98 min
Cancellation rate
2%
How often is AA3691 on time?
Across 45 flights on BOS → ORD from 2025-11-02 to 2025-12-17, AA3691 arrived within 15 minutes of schedule 70% of the time. The median arrival delay was -1 min, and the worst 10% of flights arrived +98 min or later. 2% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 31 | 70% |
| 16-30 min | 3 | 7% |
| 31-60 min | 4 | 9% |
| 61-120 min | 3 | 7% |
| 2+ hrs | 3 | 7% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 27 | 70% | +19 min |
| 2025-12 | 17 | 71% | +24 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 7 | 86% |
| Tue | 7 | 71% |
| Wed | 7 | 71% |
| Thu | 5 | 40% |
| Fri | 6 | 83% |
| Sat | 5 | 80% |
| Sun | 7 | 57% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…