UA661
United Airlines flight 661 — Newark (EWR) to Chicago (ORD)
On time
69%
Avg delay
~73 min
Cancelled
1.9%
UA661 runs late more often than average. About 69% of departures arrive on time. When delays happen, the most common cause is late-arriving aircraft.
Monthly breakdown
| Month | On time | Cancelled | Avg delay |
|---|---|---|---|
| 2026-07 | 35% | 16.1% | 88 min |
| 2026-07 | 57% | 0.0% | 98 min |
| 2026-07 | 88% | 3.7% | 19 min |
| 2026-06 | 45% | 3.3% | 131 min |
| 2026-06 | 25% | 0.0% | 40 min |
| 2026-06 | 92% | 0.0% | 107 min |
| 2026-05 | 66% | 3.3% | 81 min |
| 2026-05 | 71% | 0.0% | 95 min |
| 2026-05 | 96% | 3.8% | 67 min |
| 2026-04 | 50% | 0.0% | 80 min |
| 2026-04 | 57% | 0.0% | 78 min |
| 2026-04 | 96% | 0.0% | 47 min |
Top delay cause
late-arriving aircraft
Based on 2,411 tracked departures
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Get a free briefingData last updated October 2026. Source: Bureau of Transportation Statistics.