Flight OddsUA4036 GRR → IAH
United Airlines · Grand Rapids, MI to Houston, TX · 41 flights observed, 2026-05-21 to 2026-06-30 · 1,042 mi
UA4036 covers more than one route in the data window — the stats below are for GRR → IAH, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
66%
Median delay
+6 min
90th percentile
+70 min
Cancellation rate
0%
How often is UA4036 on time?
Across 41 flights on GRR → IAH from 2026-05-21 to 2026-06-30, UA4036 arrived within 15 minutes of schedule 66% of the time. The median arrival delay was +6 min, and the worst 10% of flights arrived +70 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 | 27 | 66% |
| 16-30 min | 5 | 12% |
| 31-60 min | 3 | 7% |
| 61-120 min | 5 | 12% |
| 2+ hrs | 1 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-05 | 11 | 82% | +9 min |
| 2026-06 | 30 | 60% | +20 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 6 | 83% |
| Tue | 6 | 50% |
| Wed | 5 | 40% |
| Thu | 6 | 67% |
| Fri | 6 | 67% |
| Sat | 6 | 67% |
| Sun | 6 | 83% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…