Flight profile · United Airlines
UA661
Newark (EWR) to Chicago (ORD) · scheduled 4:45 PM – 6:34 PM
How UA661 performs
566 operations, 2024-09-26 to 2026-06-30.
UA661 arrived on time 52.6% of the time, against 73.7% for all EWR → ORD flights — this specific departure is 21.1 percentage points worse than the route as a whole. Against United Airlines’s own flights on this route it is 21.8 points worse.
Source: US DOT Bureau of Transportation Statistics · 566 operations between 2024-09-26 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA661 | 52.6% | 1.06% | 13 min | 15.4% | 566 |
| United Airlines on EWR → ORD | 74.4% | 1.98% | -4 min | 9.8% | 12,618 |
| All EWR → ORD flights | 73.7% | 2.68% | -5 min | 10.8% | 17,929 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-09-26 to 2026-06-30
Other routes UA661 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| ORD→LAX Chicago to Los Angeles | 2025-10-26 – 2026-06-30 | 171 | 65.3% |
| SNA→EWR Santa Ana to Newark | 2026-02-12 – 2026-06-30 | 122 | 91.5% |
| TPA→EWR Tampa to Newark | 2025-05-01 – 2026-01-05 | 39 | — |
| PIT→ORD Pittsburgh to Chicago | 2025-12-02 – 2025-12-17 | 16 | — |
| SEA→EWR Seattle to Newark | 2025-10-26 – 2025-10-31 | 6 | — |
| ORD→FAT Chicago to Fresno | 2025-09-25 – 2025-10-24 | 26 | — |
| ORD→DSM Chicago to Des Moines | 2025-08-19 – 2025-09-24 | 37 | — |
| MYR→EWR Myrtle Beach to Newark | 2025-08-19 – 2025-09-01 | 14 | — |
| CLE→IAH Cleveland to Houston | 2025-08-01 – 2025-08-18 | 18 | — |
| CLT→EWR Charlotte to Newark | 2025-06-26 – 2025-07-31 | 36 | — |
| PBI→EWR West Palm Beach to Newark | 2025-04-01 – 2025-06-25 | 50 | — |
| ORD→SLC Chicago to Salt Lake City | 2024-02-15 – 2025-06-24 | 409 | 66.0% |
| RSW→EWR Fort Myers to Newark | 2025-01-07 – 2025-02-12 | 37 | — |
| ORD→DEN Chicago to Denver | 2025-01-07 – 2025-02-12 | 36 | — |
| SLC→IAD Salt Lake City to Washington | 2024-12-19 – 2025-01-06 | 17 | — |
| MIA→EWR Miami to Newark | 2024-10-27 – 2024-12-02 | 32 | — |
| ORD→PSP Chicago to Palm Springs | 2024-11-30 – 2024-12-01 | 2 | — |
| TPA→ORD Tampa to Chicago | 2023-09-29 – 2024-09-25 | 204 | 60.9% |
| EWR→TPA Newark to Tampa | 2023-09-29 – 2024-02-14 | 120 | 91.4% |
| TPA→IAH Tampa to Houston | 2024-01-09 – 2024-02-14 | 37 | — |
| ORD→EWR Chicago to Newark | 2023-10-29 – 2023-11-27 | 29 | — |
| ORD→AUS Chicago to Austin | 2023-09-29 – 2023-09-29 | 1 | — |
| EWR→IAH Newark to Houston | 2023-09-05 – 2023-09-15 | 11 | — |
| EWR→SAV Newark to Savannah | 2023-07-01 – 2023-09-04 | 65 | — |
Because the same number has served different journeys, the statistics above describe only the route UA661 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 566 records of UA661 operating EWR → ORD, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.