Flight OddsAA4545 BOS → ORD
American Airlines · Boston, MA to Chicago, IL · 36 flights observed, 2026-01-06 to 2026-02-11 · 867 mi
AA4545 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
68%
Median delay
-4 min
90th percentile
+69 min
Cancellation rate
6%
How often is AA4545 on time?
Across 36 flights on BOS → ORD from 2026-01-06 to 2026-02-11, AA4545 arrived within 15 minutes of schedule 68% of the time. The median arrival delay was -4 min, and the worst 10% of flights arrived +69 min or later. 6% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 23 | 68% |
| 16-30 min | 3 | 9% |
| 31-60 min | 4 | 12% |
| 61-120 min | 2 | 6% |
| 2+ hrs | 2 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-01 | 23 | 70% | +16 min |
| 2026-02 | 11 | 64% | +13 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 60% |
| Tue | 6 | 100% |
| Wed | 6 | 83% |
| Thu | 5 | 40% |
| Fri | 4 | 50% |
| Sat | 4 | 50% |
| 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…