UA1257
UA1257 (United Airlines) is a multi-stop service on 16 routes, busiest Miami to San Francisco. Of 742 departures recorded from October 2024 to July 2026, 91.0% left on time, according to the US BTS.
- On-time departures91.0%of 742 flights
- Average delay2.8 min
- July 202662▲ 342.9%vs July 2025
- Cancelled1.5%
- Legs flown under this number16
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 37 | 30 | ▼ 18.9% |
| February | 28 | 27 | ▼ 3.6% |
| March | 29 | 31 | ▲ 6.9% |
| April | – | 30 | – |
| May | 41 | 41 | 0.0% |
| June | 27 | 60 | ▲ 122.2% |
| July | 14 | 62 | ▲ 342.9% |
| August | 28 | – | – |
| September | 27 | – | – |
| October | 36 | – | in progress |
| November | 54 | – | – |
| December | 47 | – | – |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 88.9% | 92.9% | ▲ 4.5% |
| February | 96.4% | 100.0% | ▲ 3.7% |
| March | 96.6% | 96.8% | ▲ 0.2% |
| April | – | 93.3% | – |
| May | 97.5% | 85.4% | ▼ 12.4% |
| June | 100.0% | 91.5% | ▼ 8.5% |
| July | 92.3% | 77.4% | ▼ 16.1% |
| August | 80.8% | – | – |
| September | 96.3% | – | – |
| October | 91.7% | – | in progress |
| November | 94.4% | – | – |
| December | 97.9% | – | – |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 2 | ▲ 100.0% |
| February | 0 | 3 | – |
| March | 0 | 0 | – |
| April | – | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 1 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 2 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 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 98.5% 731
- Cancelled 1.5% 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 SFO Miami International Airport – San Francisco International Airport | 4,154 | -0.9 min | 94.6% | 148 |
| RDU IAD Raleigh-Durham International Airport – Washington Dulles International Airport | 361 | 0.2 min | 95.7% | 143 |
| IAD BDL Washington Dulles International Airport – Bradley International Airport | 523 | -2.5 min | 95.7% | 142 |
| PHX DEN Phoenix Sky Harbor International Airport – Denver International Airport | 968 | 7.0 min | 87.0% | 123 |
| SFO SAN San Francisco International Airport – San Diego International Airport | 719 | 19.2 min | 72.2% | 72 |
| IAD CMH Washington Dulles International Airport – John Glenn Columbus International Airport | 481 | -4.1 min | 100.0% | 35 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 29 | 29 | 82.8% | 0 |
| December 2024 | 44 | 44 | 81.8% | 0 |
| January 2025 | 37 | 36 | 88.9% | 1 |
| February 2025 | 28 | 28 | 96.4% | 0 |
| March 2025 | 29 | 29 | 96.6% | 0 |
| May 2025 | 41 | 40 | 97.5% | 1 |
| June 2025 | 27 | 27 | 100.0% | 0 |
| July 2025 | 14 | 13 | 92.3% | 1 |
| August 2025 | 28 | 26 | 80.8% | 2 |
| September 2025 | 27 | 27 | 96.3% | 0 |
| October 2025 | 36 | 36 | 91.7% | 0 |
| November 2025 | 54 | 54 | 94.4% | 0 |
| December 2025 | 47 | 47 | 97.9% | 0 |
| January 2026 | 30 | 28 | 92.9% | 2 |
| February 2026 | 27 | 24 | 100.0% | 3 |
| March 2026 | 31 | 31 | 96.8% | 0 |
| April 2026 | 30 | 30 | 93.3% | 0 |
| May 2026 | 41 | 41 | 85.4% | 0 |
| June 2026 | 60 | 59 | 91.5% | 1 |
| July 2026 | 62 | 62 | 77.4% | 0 |