Flight OddsAA4618 BOS → ORD
American Airlines · Boston, MA to Chicago, IL · 43 flights observed, 2025-11-03 to 2025-12-17 · 867 mi
AA4618 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
79%
Median delay
+1 min
90th percentile
+41 min
Cancellation rate
2%
How often is AA4618 on time?
Across 43 flights on BOS → ORD from 2025-11-03 to 2025-12-17, AA4618 arrived within 15 minutes of schedule 79% of the time. The median arrival delay was +1 min, and the worst 10% of flights arrived +41 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 | 33 | 79% |
| 16-30 min | 4 | 10% |
| 31-60 min | 1 | 2% |
| 61-120 min | 2 | 5% |
| 2+ hrs | 2 | 5% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 27 | 81% | +8 min |
| 2025-12 | 15 | 73% | +9 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 6 | 50% |
| Tue | 6 | 67% |
| Wed | 6 | 100% |
| Thu | 6 | 100% |
| Fri | 6 | 100% |
| Sat | 6 | 83% |
| Sun | 6 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…