Flight OddsUA4477 MDT → ORD
United Airlines · Harrisburg, PA to Chicago, IL · 36 flights observed, 2025-12-03 to 2026-05-20 · 594 mi
UA4477 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
71%
Median delay
-5 min
90th percentile
+114 min
Cancellation rate
3%
How often is UA4477 on time?
Across 36 flights on MDT → ORD from 2025-12-03 to 2026-05-20, UA4477 arrived within 15 minutes of schedule 71% of the time. The median arrival delay was -5 min, and the worst 10% of flights arrived +114 min or later. 3% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 24 | 71% |
| 16-30 min | 0 | 0% |
| 31-60 min | 3 | 9% |
| 61-120 min | 3 | 9% |
| 2+ hrs | 4 | 12% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-12 | 13 | 38% | +78 min |
| 2026-04 | 1 | 100% | -6 min |
| 2026-05 | 20 | 90% | -11 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 80% |
| Tue | 5 | 60% |
| Wed | 6 | 67% |
| Thu | 4 | 75% |
| Fri | 5 | 60% |
| Sat | 5 | 80% |
| 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…