UA1027
UA1027 (United Airlines) is a multi-stop service on 15 routes, busiest Denver to Boston. Of 709 departures recorded from October 2024 to July 2026, 72.8% left on time, according to the US BTS.
- On-time departures72.8%of 709 flights
- Average delay19.5 min
- July 202630▼ 63.9%vs July 2025
- Cancelled0.9%
- Legs flown under this number15
according to the US BTS · Oct 13, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 23 | 31 | ▲ 34.8% |
| February | 24 | 28 | ▲ 16.7% |
| March | 24 | 34 | ▲ 41.7% |
| April | 21 | 60 | ▲ 185.7% |
| May | 21 | 50 | ▲ 138.1% |
| June | 30 | 30 | 0.0% |
| July | 83 | 30 | ▼ 63.9% |
| August | 60 | – | – |
| September | 20 | – | – |
| October | 20 | – | in progress |
| November | 29 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 226 | 263 | ▲ 16.4% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 78.3% | 74.2% | ▼ 5.2% |
| February | 83.3% | 75.0% | ▼ 10.0% |
| March | 79.2% | 64.7% | ▼ 18.3% |
| April | 76.2% | 73.7% | ▼ 3.3% |
| May | 42.9% | 64.0% | ▲ 49.3% |
| June | 76.7% | 57.1% | ▼ 25.5% |
| July | 77.1% | 50.0% | ▼ 35.2% |
| August | 86.7% | – | – |
| September | 100.0% | – | – |
| October | 75.0% | – | in progress |
| November | 71.4% | – | – |
| December | 58.6% | – | – |
| Year-to-date average (Jan–Jul) | 73.4% | 65.5% | ▼ 10.7% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 3 | – |
| May | 0 | 0 | – |
| June | 0 | 2 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 5 |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
This number flies several legs
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 99.2% 703
- Cancelled 0.8% 6
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
99 of 9
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DEN BOS Denver International Airport – Boston Logan International Airport | 2,816 | 22.9 min | 65.4% | 182 |
| SFO PDX San Francisco International Airport – Portland International Airport | 886 | -1.6 min | 91.8% | 98 |
| IAH MCI George Bush Intercontinental Airport – Kansas City International Airport | 1,038 | 38.0 min | 53.6% | 71 |
| PDX DEN Portland International Airport – Denver International Airport | 1,592 | 3.3 min | 94.4% | 54 |
| ECP ORD Northwest Florida Beaches International Airport – Chicago O'Hare International Airport | 1,306 | 18.6 min | 68.6% | 52 |
| MIA EWR Miami International Airport – Newark Liberty International Airport | 1,750 | 63.3 min | 59.2% | 50 |
| IAD LAX Washington Dulles International Airport – Los Angeles International Airport | 3,674 | 13.0 min | 73.3% | 45 |
| ORD DEN Chicago O'Hare International Airport – Denver International Airport | 1,426 | 13.6 min | 75.7% | 37 |
| ORD RIC Chicago O'Hare International Airport – Richmond International Airport | 1,032 | 16.3 min | 76.7% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 15 | 15 | 86.7% | 0 |
| November 2024 | 20 | 20 | 80.0% | 0 |
| December 2024 | 27 | 27 | 70.4% | 0 |
| January 2025 | 23 | 23 | 78.3% | 0 |
| February 2025 | 24 | 24 | 83.3% | 0 |
| March 2025 | 24 | 24 | 79.2% | 0 |
| April 2025 | 21 | 21 | 76.2% | 0 |
| May 2025 | 21 | 21 | 42.9% | 0 |
| June 2025 | 30 | 30 | 76.7% | 0 |
| July 2025 | 83 | 83 | 77.1% | 0 |
| August 2025 | 60 | 60 | 86.7% | 0 |
| September 2025 | 20 | 20 | 100.0% | 0 |
| October 2025 | 20 | 20 | 75.0% | 0 |
| November 2025 | 29 | 28 | 71.4% | 1 |
| December 2025 | 29 | 29 | 58.6% | 0 |
| January 2026 | 31 | 31 | 74.2% | 0 |
| February 2026 | 28 | 28 | 75.0% | 0 |
| March 2026 | 34 | 34 | 64.7% | 0 |
| April 2026 | 60 | 57 | 73.7% | 3 |
| May 2026 | 50 | 50 | 64.0% | 0 |
| June 2026 | 30 | 28 | 57.1% | 2 |
| July 2026 | 30 | 30 | 50.0% | 0 |