Flight OddsUA4556 MDT → ORD
United Airlines · Harrisburg, PA to Chicago, IL · 103 flights observed, 2025-07-01 to 2025-10-25 · 594 mi
UA4556 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
78%
Median delay
-13 min
90th percentile
+79 min
Cancellation rate
0%
How often is UA4556 on time?
Across 103 flights on MDT → ORD from 2025-07-01 to 2025-10-25, UA4556 arrived within 15 minutes of schedule 78% of the time. The median arrival delay was -13 min, and the worst 10% of flights arrived +79 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 80 | 78% |
| 16-30 min | 1 | 1% |
| 31-60 min | 7 | 7% |
| 61-120 min | 6 | 6% |
| 2+ hrs | 8 | 8% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 22 | 73% | +32 min |
| 2025-08 | 25 | 72% | +12 min |
| 2025-09 | 30 | 83% | +6 min |
| 2025-10 | 25 | 84% | +3 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 15 | 87% |
| Tue | 17 | 94% |
| Wed | 17 | 88% |
| Thu | 17 | 59% |
| Fri | 17 | 65% |
| Sat | 10 | 80% |
| Sun | 9 | 78% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…