Flight OddsAA4539 ORD → PIT
American Airlines · Chicago, IL to Pittsburgh, PA · 132 flights observed, 2025-07-01 to 2026-06-30 · 413 mi
AA4539 covers more than one route in the data window — the stats below are for ORD → PIT, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
78%
Median delay
-4 min
90th percentile
+52 min
Cancellation rate
4%
How often is AA4539 on time?
Across 132 flights on ORD → PIT from 2025-07-01 to 2026-06-30, AA4539 arrived within 15 minutes of schedule 78% of the time. The median arrival delay was -4 min, and the worst 10% of flights arrived +52 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 | 99 | 78% |
| 16-30 min | 3 | 2% |
| 31-60 min | 15 | 12% |
| 61-120 min | 7 | 6% |
| 2+ hrs | 3 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 24 | 50% | +35 min |
| 2025-08 | 5 | 80% | +16 min |
| 2025-09 | 28 | 93% | -9 min |
| 2025-10 | 30 | 80% | 0 min |
| 2025-11 | 1 | 100% | -19 min |
| 2026-05 | 11 | 91% | -17 min |
| 2026-06 | 28 | 79% | +7 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 18 | 89% |
| Tue | 20 | 70% |
| Wed | 17 | 65% |
| Thu | 17 | 82% |
| Fri | 18 | 78% |
| Sat | 18 | 94% |
| Sun | 19 | 68% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…