UA1231
UA1231 (United Airlines) is a multi-stop service on 12 routes, busiest Miami to Newark. Of 704 departures recorded from October 2024 to July 2026, 76.9% left on time, according to the US BTS.
- On-time departures76.9%of 704 flights
- Average delay20.9 min
- July 202631▲ 19.2%vs July 2025
- Cancelled1.6%
- Legs flown under this number12
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 | 43 | ▲ 38.7% |
| February | 26 | 48 | ▲ 84.6% |
| March | 30 | 34 | ▲ 13.3% |
| April | 26 | 46 | ▲ 76.9% |
| May | 31 | 35 | ▲ 12.9% |
| June | 30 | 33 | ▲ 10.0% |
| July | 26 | 31 | ▲ 19.2% |
| August | 31 | – | – |
| September | 29 | – | – |
| October | 27 | – | in progress |
| November | 30 | – | – |
| December | 42 | – | – |
| Year to date (Jan–Jul) | 200 | 270 | ▲ 35.0% |
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 | 74.2% | 86.1% | ▲ 16.0% |
| February | 76.0% | 87.5% | ▲ 15.1% |
| March | 65.5% | 87.9% | ▲ 34.1% |
| April | 48.0% | 88.9% | ▲ 85.2% |
| May | 51.7% | 100.0% | ▲ 93.3% |
| June | 73.3% | 100.0% | ▲ 36.4% |
| July | 30.4% | 93.3% | ▲ 206.7% |
| August | 48.4% | – | – |
| September | 86.2% | – | – |
| October | 81.5% | – | in progress |
| November | 93.3% | – | – |
| December | 88.1% | – | – |
| Year-to-date average (Jan–Jul) | 59.9% | 92.0% | ▲ 53.5% |
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 | 1 | 0 | ▼ 100.0% |
| March | 1 | 1 | 0.0% |
| April | 1 | 1 | 0.0% |
| May | 2 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 3 | 1 | ▼ 66.7% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 8 | 3 | ▼ 62.5% |
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 98.4% 693
- Cancelled 1.6% 11
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 |
|---|---|---|---|---|
| MIA EWR Miami International Airport – Newark Liberty International Airport | 1,750 | 36.8 min | 57.5% | 266 |
| ORD IAH Chicago O'Hare International Airport – George Bush Intercontinental Airport | 1,491 | 1.7 min | 94.1% | 239 |
| EWR MCO Newark Liberty International Airport – Orlando International Airport | 1,511 | 12.9 min | 78.4% | 37 |
| IAH EGE George Bush Intercontinental Airport – Eagle County Regional Airport | 1,504 | 23.9 min | 74.3% | 35 |
| ATL ORD Hartsfield Jackson Atlanta International Airport – Chicago O'Hare International Airport | 976 | 47.3 min | 82.4% | 35 |
| LAS ORD Harry Reid International Airport – Chicago O'Hare International Airport | 2,432 | -1.7 min | 93.8% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 85.0% | 0 |
| November 2024 | 24 | 24 | 41.7% | 0 |
| December 2024 | 31 | 31 | 58.1% | 0 |
| January 2025 | 31 | 31 | 74.2% | 0 |
| February 2025 | 26 | 25 | 76.0% | 1 |
| March 2025 | 30 | 29 | 65.5% | 1 |
| April 2025 | 26 | 25 | 48.0% | 1 |
| May 2025 | 31 | 29 | 51.7% | 2 |
| June 2025 | 30 | 30 | 73.3% | 0 |
| July 2025 | 26 | 23 | 30.4% | 3 |
| August 2025 | 31 | 31 | 48.4% | 0 |
| September 2025 | 29 | 29 | 86.2% | 0 |
| October 2025 | 27 | 27 | 81.5% | 0 |
| November 2025 | 30 | 30 | 93.3% | 0 |
| December 2025 | 42 | 42 | 88.1% | 0 |
| January 2026 | 43 | 43 | 86.1% | 0 |
| February 2026 | 48 | 48 | 87.5% | 0 |
| March 2026 | 34 | 33 | 87.9% | 1 |
| April 2026 | 46 | 45 | 88.9% | 1 |
| May 2026 | 35 | 35 | 100.0% | 0 |
| June 2026 | 33 | 33 | 100.0% | 0 |
| July 2026 | 31 | 30 | 93.3% | 1 |