UA1851
UA1851 (United Airlines) is a multi-stop service on 22 routes, busiest Burlington to Chicago. Of 907 departures recorded from October 2024 to July 2026, 79.1% left on time, according to the US BTS.
- On-time departures79.1%of 907 flights
- Average delay13.7 min
- July 202631▼ 46.6%vs July 2025
- Cancelled0.9%
- Legs flown under this number22
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 | 56 | 57 | ▲ 1.8% |
| February | 40 | 38 | ▼ 5.0% |
| March | 55 | 52 | ▼ 5.5% |
| April | 30 | 1 | ▼ 96.7% |
| May | 50 | 35 | ▼ 30.0% |
| June | 34 | 30 | ▼ 11.8% |
| July | 58 | 31 | ▼ 46.6% |
| August | 56 | – | – |
| September | 58 | – | – |
| October | 51 | – | in progress |
| November | 46 | – | – |
| December | 32 | – | – |
| Year to date (Jan–Jul) | 323 | 244 | ▼ 24.5% |
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 | 82.1% | 65.5% | ▼ 20.3% |
| February | 87.5% | 92.1% | ▲ 5.3% |
| March | 85.5% | 60.8% | ▼ 28.9% |
| April | 96.7% | 0.0% | ▼ 100.0% |
| May | 86.0% | 57.1% | ▼ 33.6% |
| June | 87.9% | 63.3% | ▼ 27.9% |
| July | 93.1% | 44.8% | ▼ 51.8% |
| August | 90.9% | – | – |
| September | 81.0% | – | – |
| October | 76.5% | – | in progress |
| November | 71.1% | – | – |
| December | 68.8% | – | – |
| Year-to-date average (Jan–Jul) | 88.4% | 54.8% | ▼ 38.0% |
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 | 2 | – |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 0 | 2 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 5 | ▲ 400.0% |
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 99.1% 899
- Cancelled 0.9% 8
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
12Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 30 | 30 | 90.0% | 0 |
| December 2024 | 47 | 47 | 83.0% | 0 |
| January 2025 | 56 | 56 | 82.1% | 0 |
| February 2025 | 40 | 40 | 87.5% | 0 |
| March 2025 | 55 | 55 | 85.5% | 0 |
| April 2025 | 30 | 30 | 96.7% | 0 |
| May 2025 | 50 | 50 | 86.0% | 0 |
| June 2025 | 34 | 33 | 87.9% | 1 |
| July 2025 | 58 | 58 | 93.1% | 0 |
| August 2025 | 56 | 55 | 90.9% | 1 |
| September 2025 | 58 | 58 | 81.0% | 0 |
| October 2025 | 51 | 51 | 76.5% | 0 |
| November 2025 | 46 | 45 | 71.1% | 1 |
| December 2025 | 32 | 32 | 68.8% | 0 |
| January 2026 | 57 | 55 | 65.5% | 2 |
| February 2026 | 38 | 38 | 92.1% | 0 |
| March 2026 | 52 | 51 | 60.8% | 1 |
| April 2026 | 1 | 1 | 0.0% | 0 |
| May 2026 | 35 | 35 | 57.1% | 0 |
| June 2026 | 30 | 30 | 63.3% | 0 |
| July 2026 | 31 | 29 | 44.8% | 2 |