Flight profile · United Airlines
UA660
Chicago (ORD) to San Diego (SAN) · scheduled 9:05 AM – 11:48 AM
How UA660 performs
559 operations, 2024-12-19 to 2026-06-30.
UA660 arrived on time 86.9% of the time, against 74.8% for all ORD → SAN flights — this specific departure is 12.1 percentage points better than the route as a whole. Against United Airlines’s own flights on this route it is 7.5 points better.
Source: US DOT Bureau of Transportation Statistics · 559 operations between 2024-12-19 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA660 | 86.9% | 0.00% | -10 min | 4.5% | 559 |
| United Airlines on ORD → SAN | 79.5% | 0.73% | -6 min | 7.1% | 5,046 |
| All ORD → SAN flights | 74.8% | 1.05% | -4 min | 9.3% | 9,465 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-12-19 to 2026-06-30
Other routes UA660 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 |
|---|---|---|---|
| PHL→ORD Philadelphia to Chicago | 2026-01-06 – 2026-06-30 | 119 | 87.7% |
| SAV→ORD Savannah to Chicago | 2026-04-30 – 2026-04-30 | 1 | — |
| BWI→ORD Baltimore to Chicago | 2026-03-05 – 2026-03-28 | 18 | — |
| RDU→ORD Raleigh–Durham to Chicago | 2025-06-26 – 2025-07-31 | 26 | — |
| SYR→ORD Syracuse to Chicago | 2024-12-19 – 2025-03-29 | 101 | 75.2% |
| SAN→IAD San Diego to Washington | 2025-02-13 – 2025-03-29 | 45 | — |
| PIT→ORD Pittsburgh to Chicago | 2024-10-27 – 2024-12-18 | 48 | — |
| DTW→ORD Detroit to Chicago | 2024-11-22 – 2024-11-24 | 2 | — |
| ORD→LAS Chicago to Las Vegas | 2024-02-15 – 2024-10-26 | 240 | 88.1% |
| BOS→ORD Boston to Chicago | 2024-06-27 – 2024-10-26 | 121 | 94.1% |
| ORF→ORD Norfolk to Chicago | 2024-05-23 – 2024-06-26 | 35 | — |
| MEM→ORD Memphis to Chicago | 2024-02-15 – 2024-05-22 | 98 | 90.8% |
| LAS→SFO Las Vegas to San Francisco | 2024-01-09 – 2024-02-14 | 37 | — |
| SFO→EWR San Francisco to Newark | 2024-02-01 – 2024-02-14 | 14 | — |
| PHX→SFO Phoenix to San Francisco | 2023-12-21 – 2024-01-08 | 16 | — |
| EWR→IAD Newark to Washington | 2023-12-24 – 2024-01-07 | 3 | — |
| DFW→IAH Dallas–Fort Worth to Houston | 2023-12-01 – 2023-12-13 | 13 | — |
| ORD→PHX Chicago to Phoenix | 2023-11-28 – 2023-11-30 | 3 | — |
| IAD→CLE Washington to Cleveland | 2023-10-30 – 2023-11-27 | 21 | — |
| ORD→BZN Chicago to Bozeman | 2023-10-29 – 2023-11-26 | 9 | — |
| DSM→ORD Des Moines to Chicago | 2023-07-01 – 2023-10-28 | 111 | 87.9% |
| ORD→SNA Chicago to Santa Ana | 2023-07-01 – 2023-09-04 | 66 | — |
Because the same number has served different journeys, the statistics above describe only the route UA660 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 559 records of UA660 operating ORD → SAN, 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.