Flight OddsAA2121 ORD → BOS
American Airlines · Chicago, IL to Boston, MA · 20 flights observed, 2026-01-08 to 2026-02-09 · 867 mi
AA2121 covers more than one route in the data window — the stats below are for ORD → BOS, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
53%
Median delay
+15 min
90th percentile
+278 min
Cancellation rate
5%
How often is AA2121 on time?
Across 20 flights on ORD → BOS from 2026-01-08 to 2026-02-09, AA2121 arrived within 15 minutes of schedule 53% of the time. The median arrival delay was +15 min, and the worst 10% of flights arrived +278 min or later. 5% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 10 | 53% |
| 16-30 min | 2 | 11% |
| 31-60 min | 2 | 11% |
| 61-120 min | 1 | 5% |
| 2+ hrs | 4 | 21% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-01 | 13 | 54% | +94 min |
| 2026-02 | 6 | 50% | +11 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 60% |
| Tue | No data | — |
| Wed | No data | — |
| Thu | 5 | 60% |
| Fri | 5 | 20% |
| Sat | No data | — |
| Sun | 4 | 75% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…