Flight profile · United Airlines
UA2135
Seattle (SEA) to Houston (IAH) · scheduled 7:10 AM – 1:38 PM
How UA2135 performs
426 operations, 2025-03-30 to 2026-06-30.
UA2135 arrived on time 90.0% of the time, against 79.3% for all SEA → IAH flights — this specific departure is 10.7 percentage points better than the route as a whole. Against United Airlines’s own flights on this route it is 6.8 points better.
Source: US DOT Bureau of Transportation Statistics · 426 operations between 2025-03-30 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA2135 | 90.0% | 0.70% | -13 min | 3.6% | 426 |
| United Airlines on SEA → IAH | 83.2% | 1.25% | -7 min | 5.2% | 3,668 |
| All SEA → IAH flights | 79.3% | 1.24% | -5 min | 4.8% | 6,298 |
Source: FlyerIntel analysis of US DOT BTS data · 2025-03-30 to 2026-06-30
Other routes UA2135 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→ORD Houston to Chicago | 2025-03-30 – 2026-06-30 | 230 | 70.7% |
| ORD→DTW Chicago to Detroit | 2026-05-21 – 2026-06-24 | 35 | — |
| IAH→FLL Houston to Fort Lauderdale | 2025-12-02 – 2026-05-20 | 165 | 84.8% |
| IAH→LGA Houston to New York | 2025-10-26 – 2025-12-01 | 31 | — |
| ORD→DCA Chicago to Washington | 2023-10-01 – 2025-10-25 | 128 | 74.0% |
| IAH→MCI Houston to Kansas City | 2025-05-01 – 2025-05-21 | 20 | — |
| STL→DEN St. Louis to Denver | 2025-02-13 – 2025-03-29 | 45 | — |
| MIA→IAH Miami to Houston | 2025-01-07 – 2025-02-12 | 37 | — |
| IAH→JAC Houston to Jackson | 2024-12-19 – 2025-01-06 | 19 | — |
| IAH→MSY Houston to New Orleans | 2024-12-03 – 2024-12-18 | 16 | — |
| PHL→IAH Philadelphia to Houston | 2024-12-03 – 2024-12-18 | 16 | — |
| MSP→DEN Minneapolis to Denver | 2024-10-27 – 2024-12-02 | 37 | — |
| SFO→SLC San Francisco to Salt Lake City | 2024-08-19 – 2024-10-25 | 52 | — |
| SLC→DEN Salt Lake City to Denver | 2024-09-02 – 2024-09-25 | 17 | — |
| IAD→SMF Washington to Sacramento | 2024-06-27 – 2024-08-18 | 53 | — |
| GTF→DEN Great Falls to Denver | 2024-06-01 – 2024-06-26 | 26 | — |
| LAX→ORD Los Angeles to Chicago | 2024-05-02 – 2024-05-22 | 21 | — |
| MCI→IAH Kansas City to Houston | 2024-03-31 – 2024-05-01 | 32 | — |
| FLL→DEN Fort Lauderdale to Denver | 2023-10-30 – 2024-03-30 | 71 | — |
| DEN→HNL Denver to Honolulu | 2023-12-02 – 2024-03-02 | 32 | — |
| CLE→EWR Cleveland to Newark | 2023-12-13 – 2023-12-13 | 1 | — |
| PHL→SFO Philadelphia to San Francisco | 2023-12-01 – 2023-12-11 | 7 | — |
| PVD→ORD Providence/Warwick to Chicago | 2023-10-29 – 2023-10-29 | 1 | — |
| EWR→DFW Newark to Dallas–Fort Worth | 2023-07-01 – 2023-09-30 | 67 | — |
| MSN→DEN Madison to Denver | 2023-09-05 – 2023-09-28 | 24 | — |
Because the same number has served different journeys, the statistics above describe only the route UA2135 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 426 records of UA2135 operating SEA → IAH, 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.