Flight profile · United Airlines
UA664
Las Vegas (LAS) to Chicago (ORD) · scheduled 7:00 AM – 12:47 PM
How UA664 performs
985 operations, 2023-07-01 to 2026-06-30.
UA664 arrived on time 92.7% of the time, against 79.7% for all LAS → ORD flights — this specific departure is 13.0 percentage points better than the route as a whole. Against United Airlines’s own flights on this route it is 9.5 points better.
Source: US DOT Bureau of Transportation Statistics · 985 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA664 | 92.7% | 0.61% | -15 min | 2.7% | 985 |
| United Airlines on LAS → ORD | 83.2% | 1.02% | -10 min | 5.7% | 6,596 |
| All LAS → ORD flights | 79.7% | 1.12% | -8 min | 7.0% | 15,960 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does UA664 run worse on particular days?
Thursday is historically the most reliable day and Friday the least, a gap of 7.4 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Other routes UA664 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→MCI Chicago to Kansas City | 2025-10-26 – 2026-06-30 | 74 | — |
| ORD→LGA Chicago to New York | 2025-08-01 – 2026-06-24 | 53 | — |
| ORD→SRQ Chicago to Sarasota/Bradenton | 2026-03-05 – 2026-04-29 | 56 | — |
| ORD→PBI Chicago to West Palm Beach | 2026-02-12 – 2026-03-04 | 21 | — |
| CVG→ORD Cincinnati / Covington to Chicago | 2025-11-28 – 2026-01-01 | 3 | — |
| ORD→DEN Chicago to Denver | 2025-09-25 – 2025-10-25 | 31 | — |
| ORD→BOS Chicago to Boston | 2025-08-19 – 2025-09-24 | 37 | — |
| ORD→MSP Chicago to Minneapolis | 2025-06-26 – 2025-07-31 | 35 | — |
| ORD→CMH Chicago to Columbus | 2025-05-01 – 2025-05-21 | 21 | — |
| ORD→ANC Chicago to Anchorage | 2025-03-30 – 2025-04-30 | 32 | — |
| ORD→PHL Chicago to Philadelphia | 2023-07-01 – 2025-03-29 | 166 | 64.8% |
| ORD→RDU Chicago to Raleigh–Durham | 2025-02-13 – 2025-03-05 | 21 | — |
| ORD→DCA Chicago to Washington | 2025-01-07 – 2025-02-12 | 32 | — |
| ORD→TPA Chicago to Tampa | 2024-02-15 – 2025-01-06 | 98 | 87.0% |
| ORD→ATL Chicago to Atlanta | 2024-11-01 – 2024-12-02 | 31 | — |
| ORD→RSW Chicago to Fort Myers | 2024-01-01 – 2024-09-25 | 43 | — |
| DEN→BZN Denver to Bozeman | 2024-06-27 – 2024-08-18 | 53 | — |
| TPA→IAD Tampa to Washington | 2024-03-31 – 2024-05-01 | 32 | — |
| DEN→RSW Denver to Fort Myers | 2024-03-08 – 2024-03-30 | 11 | — |
| ORD→OMA Chicago to Omaha | 2024-03-07 – 2024-03-28 | 13 | — |
| ORD→JAX Chicago to Jacksonville | 2023-12-01 – 2023-12-18 | 14 | — |
| PHL→DEN Philadelphia to Denver | 2023-08-01 – 2023-09-04 | 35 | — |
Because the same number has served different journeys, the statistics above describe only the route UA664 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 985 records of UA664 operating LAS → 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.