Flight OddsUA4581 MDT → ORD
United Airlines · Harrisburg, PA to Chicago, IL · 17 flights observed, 2025-12-18 to 2026-01-05 · 594 mi
UA4581 covers more than one route in the data window — the stats below are for MDT → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
88%
Median delay
0 min
90th percentile
+23 min
Cancellation rate
6%
How often is UA4581 on time?
Across 17 flights on MDT → ORD from 2025-12-18 to 2026-01-05, UA4581 arrived within 15 minutes of schedule 88% of the time. The median arrival delay was 0 min, and the worst 10% of flights arrived +23 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 | 14 | 88% |
| 16-30 min | 0 | 0% |
| 31-60 min | 1 | 6% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 1 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-12 | 11 | 91% | +11 min |
| 2026-01 | 5 | 80% | -11 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 3 | 100% |
| Tue | 2 | 100% |
| Wed | No data | — |
| Thu | 3 | 100% |
| Fri | 2 | 50% |
| Sat | 3 | 100% |
| Sun | 3 | 67% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…