Flight profile · United Airlines
UA1727
Buffalo (BUF) to Denver (DEN) · scheduled 8:25 AM – 10:09 AM
How UA1727 performs
333 operations, 2025-05-22 to 2026-06-30.
UA1727 arrived on time 84.3% of the time, against 78.2% for all BUF → DEN flights — this specific departure is 6.2 percentage points better than the route as a whole.
Source: US DOT Bureau of Transportation Statistics · 333 operations between 2025-05-22 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA1727 | 84.3% | 0.30% | -4 min | 5.4% | 333 |
| United Airlines on BUF → DEN | 84.3% | 0.30% | -4 min | 5.4% | 333 |
| All BUF → DEN flights | 78.2% | 0.74% | -5 min | 5.7% | 1,480 |
Source: FlyerIntel analysis of US DOT BTS data · 2025-05-22 to 2026-06-30
Other routes UA1727 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 |
|---|---|---|---|
| JAC→DEN Jackson to Denver | 2026-01-06 – 2026-02-11 | 37 | — |
| EWR→CLE Newark to Cleveland | 2025-12-18 – 2026-01-05 | 19 | — |
| IAH→BWI Houston to Baltimore | 2025-12-02 – 2025-12-17 | 16 | — |
| DEN→ORD Denver to Chicago | 2025-03-06 – 2025-05-21 | 77 | — |
| TPA→DEN Tampa to Denver | 2025-05-01 – 2025-05-21 | 21 | — |
| ORD→PWM Chicago to Portland | 2025-05-01 – 2025-05-21 | 21 | — |
| SFO→DEN San Francisco to Denver | 2025-03-30 – 2025-04-30 | 32 | — |
| ORD→OMA Chicago to Omaha | 2025-04-01 – 2025-04-30 | 25 | — |
| ORD→EWR Chicago to Newark | 2025-03-06 – 2025-03-28 | 20 | — |
| AUS→IAD Austin to Washington | 2024-05-23 – 2025-03-05 | 213 | 90.5% |
| SJC→DEN San Jose to Denver | 2025-02-23 – 2025-03-02 | 2 | — |
| ORD→PHX Chicago to Phoenix | 2025-01-07 – 2025-02-12 | 37 | — |
| SJC→LAS San Jose to Las Vegas | 2024-01-08 – 2025-01-06 | 2 | — |
| LAS→DEN Las Vegas to Denver | 2025-01-06 – 2025-01-06 | 1 | — |
| MCO→IAD Orlando to Washington | 2024-12-19 – 2025-01-05 | 18 | — |
| IAH→IAD Houston to Washington | 2024-05-02 – 2024-05-22 | 21 | — |
| LAX→DEN Los Angeles to Denver | 2024-03-31 – 2024-05-01 | 32 | — |
| LAS→IAH Las Vegas to Houston | 2023-09-05 – 2024-03-30 | 146 | 84.6% |
| LAX→SFO Los Angeles to San Francisco | 2024-02-15 – 2024-03-06 | 21 | — |
| LAS→SFO Las Vegas to San Francisco | 2024-01-09 – 2024-02-14 | 37 | — |
| LAS→EWR Las Vegas to Newark | 2023-09-29 – 2023-09-30 | 2 | — |
| DEN→SEA Denver to Seattle | 2023-07-01 – 2023-09-04 | 66 | — |
| RDU→DEN Raleigh–Durham to Denver | 2023-07-01 – 2023-07-31 | 30 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1727 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 333 records of UA1727 operating BUF → DEN, 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.