Flight profile · United Airlines
UA1663
Houston (IAH) to Philadelphia (PHL) · scheduled 6:05 PM – 10:59 PM
How UA1663 performs
369 operations, 2025-03-06 to 2026-06-30.
UA1663 arrived on time 76.4% of the time, against 80.1% for all IAH → PHL flights — this specific departure is 3.7 percentage points worse than the route as a whole. Against United Airlines’s own flights on this route it is 5.3 points worse.
Source: US DOT Bureau of Transportation Statistics · 369 operations between 2025-03-06 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA1663 | 76.4% | 1.36% | -3 min | 8.5% | 369 |
| United Airlines on IAH → PHL | 81.7% | 1.18% | -6 min | 7.5% | 2,797 |
| All IAH → PHL flights | 80.1% | 1.96% | -7 min | 9.0% | 5,706 |
Source: FlyerIntel analysis of US DOT BTS data · 2025-03-06 to 2026-06-30
Other routes UA1663 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 |
|---|---|---|---|
| IAH→JAC Houston to Jackson | 2026-05-22 – 2026-06-27 | 12 | — |
| IAH→STL Houston to St. Louis | 2026-03-05 – 2026-03-28 | 24 | — |
| EWR→FLL Newark to Fort Lauderdale | 2025-09-25 – 2025-10-25 | 31 | — |
| LAX→IAH Los Angeles to Houston | 2025-09-02 – 2025-09-24 | 23 | — |
| EWR→JAX Newark to Jacksonville | 2025-08-12 – 2025-08-12 | 1 | — |
| IAD→ATL Washington to Atlanta | 2025-06-26 – 2025-07-31 | 36 | — |
| LAS→IAH Las Vegas to Houston | 2025-06-01 – 2025-06-25 | 25 | — |
| SAN→IAH San Diego to Houston | 2025-05-01 – 2025-05-21 | 21 | — |
| LIH→DEN Lihue, Kauai to Denver | 2025-03-15 – 2025-04-26 | 7 | — |
| IAD→EWR Washington to Newark | 2025-02-13 – 2025-03-05 | 21 | — |
| JAC→DEN Jackson to Denver | 2025-01-07 – 2025-02-12 | 37 | — |
| IAH→BOS Houston to Boston | 2024-12-19 – 2025-01-06 | 19 | — |
| ORD→CMH Chicago to Columbus | 2024-12-03 – 2024-12-18 | 16 | — |
| ORD→ATL Chicago to Atlanta | 2024-10-27 – 2024-12-02 | 37 | — |
| OMA→IAH Omaha to Houston | 2024-07-02 – 2024-10-26 | 112 | 81.8% |
| IAH→PHX Houston to Phoenix | 2024-09-26 – 2024-10-26 | 31 | — |
| IAH→MSP Houston to Minneapolis | 2024-09-08 – 2024-09-08 | 1 | — |
| IAH→MFE Houston to McAllen | 2024-05-23 – 2024-08-17 | 86 | — |
| SMF→IAH Sacramento to Houston | 2024-05-23 – 2024-06-26 | 35 | — |
| IAH→SAT Houston to San Antonio | 2024-05-22 – 2024-05-22 | 1 | — |
| IAH→RSW Houston to Fort Myers | 2024-03-31 – 2024-05-21 | 52 | — |
| PBI→DEN West Palm Beach to Denver | 2024-02-17 – 2024-03-30 | 7 | — |
| DCA→ORD Washington to Chicago | 2024-03-07 – 2024-03-29 | 20 | — |
| EWR→ATL Newark to Atlanta | 2024-02-15 – 2024-03-06 | 18 | — |
| LAX→EWR Los Angeles to Newark | 2024-02-15 – 2024-03-06 | 17 | — |
| MSY→IAH New Orleans to Houston | 2024-01-09 – 2024-02-14 | 37 | — |
| JAX→ORD Jacksonville to Chicago | 2023-07-01 – 2023-11-27 | 148 | 95.7% |
| ORD→BNA Chicago to Nashville | 2023-10-01 – 2023-10-28 | 27 | — |
| ORD→GRR Chicago to Grand Rapids | 2023-09-29 – 2023-09-30 | 2 | — |
| ORD→BOS Chicago to Boston | 2023-09-05 – 2023-09-28 | 24 | — |
| ORD→LGA Chicago to New York | 2023-07-01 – 2023-09-04 | 66 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1663 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 369 records of UA1663 operating IAH → PHL, 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.