Flight OddsAA1121 BOS → ORD
American Airlines · Boston, MA to Chicago, IL · 7 flights observed, 2025-12-26 to 2026-01-04 · 867 mi
AA1121 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
71%
Median delay
+3 min
90th percentile
+292 min
Cancellation rate
0%
How often is AA1121 on time?
Across 7 flights on BOS → ORD from 2025-12-26 to 2026-01-04, AA1121 arrived within 15 minutes of schedule 71% of the time. The median arrival delay was +3 min, and the worst 10% of flights arrived +292 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 | 5 | 71% |
| 16-30 min | 0 | 0% |
| 31-60 min | 0 | 0% |
| 61-120 min | 1 | 14% |
| 2+ hrs | 1 | 14% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-12 | 4 | 75% | +151 min |
| 2026-01 | 3 | 67% | +15 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 1 | 100% |
| Tue | 1 | 0% |
| Wed | No data | — |
| Thu | 1 | 100% |
| Fri | 2 | 100% |
| Sat | No data | — |
| 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…