UA1727
UA1727 (United Airlines) is a multi-stop service on 16 routes, busiest Buffalo to Denver. Of 777 departures recorded from October 2024 to July 2026, 86.0% left on time, according to the US BTS.
- On-time departures86.0%of 777 flights
- Average delay7.3 min
- July 202631▲ 0.0%vs July 2025
- Cancelled0.1%
- Legs flown under this number16
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 32 | 31 | ▼ 3.1% |
| February | 27 | 28 | ▲ 3.7% |
| March | 53 | 31 | ▼ 41.5% |
| April | 85 | 30 | ▼ 64.7% |
| May | 73 | 31 | ▼ 57.5% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 331 | 212 | ▼ 36.0% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 87.5% | 77.4% | ▼ 11.5% |
| February | 92.6% | 78.6% | ▼ 15.1% |
| March | 84.9% | 90.3% | ▲ 6.4% |
| April | 82.4% | 90.0% | ▲ 9.3% |
| May | 86.3% | 90.3% | ▲ 4.7% |
| June | 89.7% | 86.7% | ▼ 3.3% |
| July | 83.9% | 93.6% | ▲ 11.5% |
| August | 87.1% | – | – |
| September | 83.3% | – | – |
| October | 90.3% | – | in progress |
| November | 80.0% | – | – |
| December | 87.1% | – | – |
| Year-to-date average (Jan–Jul) | 86.7% | 86.7% | ▼ 0.1% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 0 | ▼ 100.0% |
according to the US BTS · October 2024 → July 2026
This is a historical record of departures already flown, not a forecast for your flight.
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 99.9% 776
- Cancelled 0.1% 1
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BUF DEN Buffalo Niagara International Airport – Denver International Airport | 2,182 | 8.1 min | 87.3% | 364 |
| AUS IAD Austin Bergstrom International Airport – Washington Dulles International Airport | 2,084 | -1.8 min | 93.0% | 86 |
| DEN ORD Denver International Airport – Chicago O'Hare International Airport | 1,426 | 4.0 min | 87.0% | 77 |
| ORD PHX Chicago O'Hare International Airport – Phoenix Sky Harbor International Airport | 2,313 | 0.8 min | 91.9% | 37 |
| JAC DEN Jackson Hole Airport – Denver International Airport | 653 | 4.3 min | 81.1% | 37 |
| SFO DEN San Francisco International Airport – Denver International Airport | 1,553 | 3.3 min | 87.5% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 30 | 30 | 90.0% | 0 |
| December 2024 | 31 | 31 | 74.2% | 0 |
| January 2025 | 32 | 32 | 87.5% | 0 |
| February 2025 | 27 | 27 | 92.6% | 0 |
| March 2025 | 53 | 53 | 84.9% | 0 |
| April 2025 | 85 | 85 | 82.4% | 0 |
| May 2025 | 73 | 73 | 86.3% | 0 |
| June 2025 | 30 | 29 | 89.7% | 1 |
| July 2025 | 31 | 31 | 83.9% | 0 |
| August 2025 | 31 | 31 | 87.1% | 0 |
| September 2025 | 30 | 30 | 83.3% | 0 |
| October 2025 | 31 | 31 | 90.3% | 0 |
| November 2025 | 30 | 30 | 80.0% | 0 |
| December 2025 | 31 | 31 | 87.1% | 0 |
| January 2026 | 31 | 31 | 77.4% | 0 |
| February 2026 | 28 | 28 | 78.6% | 0 |
| March 2026 | 31 | 31 | 90.3% | 0 |
| April 2026 | 30 | 30 | 90.0% | 0 |
| May 2026 | 31 | 31 | 90.3% | 0 |
| June 2026 | 30 | 30 | 86.7% | 0 |
| July 2026 | 31 | 31 | 93.6% | 0 |