Flight OddsUA4577 MSN → ORD
United Airlines · Madison, WI to Chicago, IL · 127 flights observed, 2026-01-06 to 2026-05-20 · 108 mi
UA4577 covers more than one route in the data window — the stats below are for MSN → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
69%
Median delay
-5 min
90th percentile
+120 min
Cancellation rate
2%
How often is UA4577 on time?
Across 127 flights on MSN → ORD from 2026-01-06 to 2026-05-20, UA4577 arrived within 15 minutes of schedule 69% of the time. The median arrival delay was -5 min, and the worst 10% of flights arrived +120 min or later. 2% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 86 | 69% |
| 16-30 min | 12 | 10% |
| 31-60 min | 6 | 5% |
| 61-120 min | 8 | 6% |
| 2+ hrs | 13 | 10% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-01 | 26 | 77% | +10 min |
| 2026-02 | 27 | 78% | -1 min |
| 2026-03 | 26 | 65% | +39 min |
| 2026-04 | 26 | 65% | +41 min |
| 2026-05 | 20 | 55% | +17 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 17 | 65% |
| Tue | 19 | 74% |
| Wed | 18 | 56% |
| Thu | 18 | 67% |
| Fri | 18 | 61% |
| Sat | 19 | 74% |
| Sun | 16 | 88% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…