Flight OddsAA2278 ORD → BOS
American Airlines · Chicago, IL to Boston, MA · 44 flights observed, 2026-04-07 to 2026-05-20 · 867 mi
AA2278 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
41%
Median delay
+33 min
90th percentile
+108 min
Cancellation rate
0%
How often is AA2278 on time?
Across 44 flights on ORD → BOS from 2026-04-07 to 2026-05-20, AA2278 arrived within 15 minutes of schedule 41% of the time. The median arrival delay was +33 min, and the worst 10% of flights arrived +108 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 | 18 | 41% |
| 16-30 min | 3 | 7% |
| 31-60 min | 8 | 18% |
| 61-120 min | 12 | 27% |
| 2+ hrs | 3 | 7% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 24 | 42% | +33 min |
| 2026-05 | 20 | 40% | +48 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 6 | 33% |
| Tue | 7 | 14% |
| Wed | 7 | 43% |
| Thu | 6 | 17% |
| Fri | 6 | 17% |
| Sat | 6 | 83% |
| Sun | 6 | 83% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…