UA1183
UA1183 (United Airlines) is a multi-stop service on 17 routes, busiest Boston to Houston. Of 818 departures recorded from October 2024 to July 2026, 79.3% left on time, according to the US BTS.
- On-time departures79.3%of 818 flights
- Average delay13.5 min
- July 202652▲ 67.7%vs July 2025
- Cancelled0.7%
- Legs flown under this number17
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 | 31 | 36 | ▲ 16.1% |
| February | 27 | 62 | ▲ 129.6% |
| March | 30 | 35 | ▲ 16.7% |
| April | 30 | 31 | ▲ 3.3% |
| May | 31 | 58 | ▲ 87.1% |
| June | 30 | 51 | ▲ 70.0% |
| July | 31 | 52 | ▲ 67.7% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 37 | – | in progress |
| November | 60 | – | – |
| December | 45 | – | – |
| Year to date (Jan–Jul) | 210 | 325 | ▲ 54.8% |
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 | 80.0% | 75.0% | ▼ 6.3% |
| February | 81.5% | 76.7% | ▼ 5.9% |
| March | 83.3% | 85.3% | ▲ 2.4% |
| April | 96.7% | 96.8% | ▲ 0.1% |
| May | 64.5% | 75.9% | ▲ 17.6% |
| June | 66.7% | 68.6% | ▲ 2.9% |
| July | 40.0% | 58.8% | ▲ 47.1% |
| August | 74.2% | – | – |
| September | 90.0% | – | – |
| October | 91.9% | – | in progress |
| November | 98.3% | – | – |
| December | 77.8% | – | – |
| Year-to-date average (Jan–Jul) | 73.2% | 76.7% | ▲ 4.8% |
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 | 1 | 0 | ▼ 100.0% |
| February | 0 | 2 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 1 | 0.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 4 | ▲ 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 99.3% 812
- Cancelled 0.7% 6
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
11Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 29 | 29 | 93.1% | 0 |
| December 2024 | 31 | 31 | 87.1% | 0 |
| January 2025 | 31 | 30 | 80.0% | 1 |
| February 2025 | 27 | 27 | 81.5% | 0 |
| March 2025 | 30 | 30 | 83.3% | 0 |
| April 2025 | 30 | 30 | 96.7% | 0 |
| May 2025 | 31 | 31 | 64.5% | 0 |
| June 2025 | 30 | 30 | 66.7% | 0 |
| July 2025 | 31 | 30 | 40.0% | 1 |
| August 2025 | 31 | 31 | 74.2% | 0 |
| September 2025 | 30 | 30 | 90.0% | 0 |
| October 2025 | 37 | 37 | 91.9% | 0 |
| November 2025 | 60 | 60 | 98.3% | 0 |
| December 2025 | 45 | 45 | 77.8% | 0 |
| January 2026 | 36 | 36 | 75.0% | 0 |
| February 2026 | 62 | 60 | 76.7% | 2 |
| March 2026 | 35 | 34 | 85.3% | 1 |
| April 2026 | 31 | 31 | 96.8% | 0 |
| May 2026 | 58 | 58 | 75.9% | 0 |
| June 2026 | 51 | 51 | 68.6% | 0 |
| July 2026 | 52 | 51 | 58.8% | 1 |