Flight profile · United Airlines
UA1977
Houston (IAH) to Boston (BOS) · scheduled 7:30 AM – 12:27 PM
How UA1977 performs
500 operations, 2025-02-13 to 2026-06-30.
UA1977 arrived on time 94.2% of the time, against 73.8% for all IAH → BOS flights — this specific departure is 20.4 percentage points better than the route as a whole. Against United Airlines’s own flights on this route it is 15.9 points better.
Source: US DOT Bureau of Transportation Statistics · 500 operations between 2025-02-13 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA1977 | 94.2% | 0.60% | -11 min | 2.6% | 500 |
| United Airlines on IAH → BOS | 78.2% | 1.17% | -6 min | 9.3% | 4,444 |
| All IAH → BOS flights | 73.8% | 1.43% | -4 min | 11.6% | 5,944 |
Source: FlyerIntel analysis of US DOT BTS data · 2025-02-13 to 2026-06-30
Other routes UA1977 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 |
|---|---|---|---|
| BOS→EWR Boston to Newark | 2024-01-09 – 2025-05-16 | 268 | 70.1% |
| EWR→DTW Newark to Detroit | 2025-01-07 – 2025-02-12 | 32 | — |
| IAH→DCA Houston to Washington | 2024-12-19 – 2025-01-06 | 19 | — |
| EWR→PBI Newark to West Palm Beach | 2024-10-27 – 2024-12-02 | 31 | — |
| ORD→MSN Chicago to Madison | 2024-10-18 – 2024-10-25 | 3 | — |
| IAD→CMH Washington to Columbus | 2024-09-26 – 2024-10-24 | 17 | — |
| SFO→ONT San Francisco to Ontario | 2024-10-11 – 2024-10-13 | 2 | — |
| EWR→AUS Newark to Austin | 2024-08-01 – 2024-08-17 | 13 | — |
| EWR→ORD Newark to Chicago | 2024-05-23 – 2024-06-26 | 35 | — |
| EWR→IAH Newark to Houston | 2023-10-29 – 2024-01-08 | 71 | — |
| CLE→LAX Cleveland to Los Angeles | 2023-07-01 – 2023-10-28 | 120 | 97.5% |
| LAX→SFO Los Angeles to San Francisco | 2023-07-01 – 2023-09-04 | 56 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1977 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 500 records of UA1977 operating IAH → BOS, 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.