UA1581
UA1581 (United Airlines) is a multi-stop service on 26 routes, busiest San Francisco to Honolulu. Of 689 departures recorded from October 2024 to July 2026, 86.6% left on time, according to the US BTS.
- On-time departures86.6%of 689 flights
- Average delay8.4 min
- July 202631▲ 0.0%vs July 2025
- Cancelled0.6%
- Legs flown under this number26
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 | 36 | 31 | ▼ 13.9% |
| February | 40 | 28 | ▼ 30.0% |
| March | 34 | 43 | ▲ 26.5% |
| April | 30 | 8 | ▼ 73.3% |
| May | 30 | 11 | ▼ 63.3% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 37 | – | in progress |
| November | 55 | – | – |
| December | 32 | – | – |
| Year to date (Jan–Jul) | 231 | 182 | ▼ 21.2% |
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 | 83.3% | 90.3% | ▲ 8.4% |
| February | 72.5% | 82.1% | ▲ 13.3% |
| March | 84.9% | 81.4% | ▼ 4.1% |
| April | 90.0% | 75.0% | ▼ 16.7% |
| May | 69.0% | 100.0% | ▲ 45.0% |
| June | 96.7% | 90.0% | ▼ 6.9% |
| July | 96.8% | 100.0% | ▲ 3.3% |
| August | 83.9% | – | – |
| September | 73.3% | – | – |
| October | 91.7% | – | in progress |
| November | 83.3% | – | – |
| December | 96.9% | – | – |
| Year-to-date average (Jan–Jul) | 84.7% | 88.4% | ▲ 4.3% |
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 | 0 | 0 | – |
| March | 1 | 0 | ▼ 100.0% |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 0 | ▼ 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% 685
- 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
10Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 100.0% | 0 |
| November 2024 | 27 | 27 | 92.6% | 0 |
| December 2024 | 44 | 44 | 84.1% | 0 |
| January 2025 | 36 | 36 | 83.3% | 0 |
| February 2025 | 40 | 40 | 72.5% | 0 |
| March 2025 | 34 | 33 | 84.9% | 1 |
| April 2025 | 30 | 30 | 90.0% | 0 |
| May 2025 | 30 | 29 | 69.0% | 1 |
| June 2025 | 30 | 30 | 96.7% | 0 |
| July 2025 | 31 | 31 | 96.8% | 0 |
| August 2025 | 31 | 31 | 83.9% | 0 |
| September 2025 | 30 | 30 | 73.3% | 0 |
| October 2025 | 37 | 36 | 91.7% | 1 |
| November 2025 | 55 | 54 | 83.3% | 1 |
| December 2025 | 32 | 32 | 96.9% | 0 |
| January 2026 | 31 | 31 | 90.3% | 0 |
| February 2026 | 28 | 28 | 82.1% | 0 |
| March 2026 | 43 | 43 | 81.4% | 0 |
| April 2026 | 8 | 8 | 75.0% | 0 |
| May 2026 | 11 | 11 | 100.0% | 0 |
| June 2026 | 30 | 30 | 90.0% | 0 |
| July 2026 | 31 | 31 | 100.0% | 0 |