Flight OddsAA3901 BOS → ORD
American Airlines · Boston, MA to Chicago, IL · 4 flights observed, 2026-03-14 to 2026-04-04 · 867 mi
AA3901 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
75%
Median delay
-5 min
90th percentile
+22 min
Cancellation rate
0%
How often is AA3901 on time?
Across 4 flights on BOS → ORD from 2026-03-14 to 2026-04-04, AA3901 arrived within 15 minutes of schedule 75% of the time. The median arrival delay was -5 min, and the worst 10% of flights arrived +22 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 | 3 | 75% |
| 16-30 min | 0 | 0% |
| 31-60 min | 1 | 25% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 3 | 100% | -10 min |
| 2026-04 | 1 | 0% | +31 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | No data | — |
| Tue | No data | — |
| Wed | No data | — |
| Thu | No data | — |
| Fri | No data | — |
| Sat | 4 | 75% |
| Sun | No data | — |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…