Flight OddsAA4539 PIT → ORD
American Airlines · Pittsburgh, PA to Chicago, IL · 28 flights observed, 2025-08-06 to 2025-09-02 · 413 mi
AA4539 covers more than one route in the data window — the stats below are for PIT → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
81%
Median delay
-15 min
90th percentile
+23 min
Cancellation rate
4%
How often is AA4539 on time?
Across 28 flights on PIT → ORD from 2025-08-06 to 2025-09-02, AA4539 arrived within 15 minutes of schedule 81% of the time. The median arrival delay was -15 min, and the worst 10% of flights arrived +23 min or later. 4% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 22 | 81% |
| 16-30 min | 3 | 11% |
| 31-60 min | 1 | 4% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 1 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 25 | 80% | +0 min |
| 2025-09 | 2 | 100% | -16 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 75% |
| Tue | 4 | 100% |
| Wed | 4 | 100% |
| Thu | 4 | 75% |
| Fri | 4 | 50% |
| Sat | 4 | 75% |
| Sun | 3 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…