Flight OddsUA4398 GRR → ORD
United Airlines · Grand Rapids, MI to Chicago, IL · 15 flights observed, 2026-03-30 to 2026-04-29 · 137 mi
UA4398 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
64%
Median delay
-4 min
90th percentile
+229 min
Cancellation rate
7%
How often is UA4398 on time?
Across 15 flights on GRR → ORD from 2026-03-30 to 2026-04-29, UA4398 arrived within 15 minutes of schedule 64% of the time. The median arrival delay was -4 min, and the worst 10% of flights arrived +229 min or later. 7% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 9 | 64% |
| 16-30 min | 1 | 7% |
| 31-60 min | 1 | 7% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 3 | 21% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 2 | 50% | +77 min |
| 2026-04 | 12 | 67% | +70 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 1 | 0% |
| Tue | 1 | 100% |
| Wed | 4 | 75% |
| Thu | 4 | 50% |
| Fri | No data | — |
| Sat | No data | — |
| 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…