UA1001
UA1001 (United Airlines) is a multi-stop service on 13 routes, busiest Burlington to Chicago. Of 696 departures recorded from October 2024 to July 2026, 76.9% left on time, according to the US BTS.
- On-time departures76.9%of 696 flights
- Average delay18.7 min
- July 202631▼ 48.3%vs July 2025
- Cancelled0.6%
- Legs flown under this number13
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 | 37 | 31 | ▼ 16.2% |
| February | 28 | 28 | 0.0% |
| March | 31 | 31 | 0.0% |
| April | 30 | 18 | ▼ 40.0% |
| May | 31 | 31 | 0.0% |
| June | 35 | 30 | ▼ 14.3% |
| July | 60 | 31 | ▼ 48.3% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 252 | 200 | ▼ 20.6% |
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 | 86.5% | 73.3% | ▼ 15.2% |
| February | 89.3% | 89.3% | 0.0% |
| March | 64.5% | 76.7% | ▲ 18.8% |
| April | 63.3% | 88.9% | ▲ 40.4% |
| May | 93.6% | 90.3% | ▼ 3.5% |
| June | 62.9% | 66.7% | ▲ 6.1% |
| July | 52.5% | 51.6% | ▼ 1.8% |
| August | 74.2% | – | – |
| September | 86.7% | – | – |
| October | 96.8% | – | in progress |
| November | 71.4% | – | – |
| December | 74.2% | – | – |
| Year-to-date average (Jan–Jul) | 73.2% | 76.7% | ▲ 4.7% |
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 | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 2 | ▲ 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 99.4% 692
- Cancelled 0.6% 4
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 |
|---|---|---|---|---|
| BTV ORD Patrick Leahy Burlington International Airport – Chicago O'Hare International Airport | 1,225 | 21.7 min | 80.7% | 349 |
| PNS DEN Pensacola International Airport – Denver International Airport | 1,896 | 29.4 min | 62.5% | 72 |
| LAX DEN Los Angeles International Airport – Denver International Airport | 1,385 | -5.0 min | 96.2% | 52 |
| EWR DEN Newark Liberty International Airport – Denver International Airport | 2,576 | 7.2 min | 77.8% | 37 |
| ORD SEA Chicago O'Hare International Airport – Seattle–Tacoma International Airport | 2,762 | 37.1 min | 35.3% | 35 |
| DEN SFO Denver International Airport – San Francisco International Airport | 1,553 | 18.3 min | 62.5% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 100.0% | 0 |
| November 2024 | 30 | 30 | 96.7% | 0 |
| December 2024 | 42 | 42 | 78.6% | 0 |
| January 2025 | 37 | 37 | 86.5% | 0 |
| February 2025 | 28 | 28 | 89.3% | 0 |
| March 2025 | 31 | 31 | 64.5% | 0 |
| April 2025 | 30 | 30 | 63.3% | 0 |
| May 2025 | 31 | 31 | 93.6% | 0 |
| June 2025 | 35 | 35 | 62.9% | 0 |
| July 2025 | 60 | 59 | 52.5% | 1 |
| August 2025 | 31 | 31 | 74.2% | 0 |
| September 2025 | 30 | 30 | 86.7% | 0 |
| October 2025 | 31 | 31 | 96.8% | 0 |
| November 2025 | 29 | 28 | 71.4% | 1 |
| December 2025 | 31 | 31 | 74.2% | 0 |
| January 2026 | 31 | 30 | 73.3% | 1 |
| February 2026 | 28 | 28 | 89.3% | 0 |
| March 2026 | 31 | 30 | 76.7% | 1 |
| April 2026 | 18 | 18 | 88.9% | 0 |
| May 2026 | 31 | 31 | 90.3% | 0 |
| June 2026 | 30 | 30 | 66.7% | 0 |
| July 2026 | 31 | 31 | 51.6% | 0 |