Flight OddsUA4583 GRR → ORD
United Airlines · Grand Rapids, MI to Chicago, IL · 176 flights observed, 2025-07-01 to 2026-05-20 · 137 mi
UA4583 covers more than one route in the data window — the stats below are for GRR → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
72%
Median delay
-2 min
90th percentile
+96 min
Cancellation rate
2%
How often is UA4583 on time?
Across 176 flights on GRR → ORD from 2025-07-01 to 2026-05-20, UA4583 arrived within 15 minutes of schedule 72% of the time. The median arrival delay was -2 min, and the worst 10% of flights arrived +96 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 | 123 | 72% |
| 16-30 min | 16 | 9% |
| 31-60 min | 10 | 6% |
| 61-120 min | 10 | 6% |
| 2+ hrs | 13 | 8% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 26 | 88% | +0 min |
| 2025-08 | 26 | 88% | -1 min |
| 2025-09 | 24 | 83% | +7 min |
| 2026-02 | 17 | 76% | +5 min |
| 2026-03 | 29 | 52% | +46 min |
| 2026-04 | 30 | 57% | +43 min |
| 2026-05 | 20 | 60% | +22 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 25 | 76% |
| Tue | 27 | 70% |
| Wed | 27 | 74% |
| Thu | 26 | 73% |
| Fri | 23 | 52% |
| Sat | 19 | 74% |
| Sun | 25 | 80% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…