UA1561
UA1561 (United Airlines) is a multi-stop service on 13 routes, busiest Denver to San Francisco. Of 1,406 departures recorded from October 2024 to July 2026, 81.8% left on time, according to the US BTS.
- On-time departures81.8%of 1,406 flights
- Average delay9.5 min
- July 202676▲ 22.6%vs July 2025
- Cancelled0.2%
- Legs flown under this number13
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 | 68 | 66 | ▼ 2.9% |
| February | 72 | 39 | ▼ 45.8% |
| March | 43 | 81 | ▲ 88.4% |
| April | 56 | 60 | ▲ 7.1% |
| May | 83 | 61 | ▼ 26.5% |
| June | 60 | 66 | ▲ 10.0% |
| July | 62 | 76 | ▲ 22.6% |
| August | 49 | – | – |
| September | 30 | – | – |
| October | 43 | – | in progress |
| November | 90 | – | – |
| December | 74 | – | – |
| Year to date (Jan–Jul) | 444 | 449 | ▲ 1.1% |
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 | 82.4% | 86.4% | ▲ 4.9% |
| February | 73.6% | 84.6% | ▲ 15.0% |
| March | 83.7% | 88.9% | ▲ 6.2% |
| April | 89.3% | 85.0% | ▼ 4.8% |
| May | 92.8% | 65.6% | ▼ 29.3% |
| June | 86.7% | 69.7% | ▼ 19.6% |
| July | 79.0% | 64.5% | ▼ 18.4% |
| August | 87.8% | – | – |
| September | 89.7% | – | – |
| October | 88.4% | – | in progress |
| November | 80.9% | – | – |
| December | 81.1% | – | – |
| Year-to-date average (Jan–Jul) | 83.9% | 77.8% | ▼ 7.3% |
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 | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 1 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 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 99.8% 1,403
- Cancelled 0.2% 3
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 |
|---|---|---|---|---|
| DEN SFO Denver International Airport – San Francisco International Airport | 1,553 | 11.8 min | 78.5% | 566 |
| SFO PHX San Francisco International Airport – Phoenix Sky Harbor International Airport | 1,047 | 7.2 min | 84.9% | 484 |
| SFO ONT San Francisco International Airport – Ontario International Airport | 585 | 5.8 min | 86.8% | 76 |
| SFO SAN San Francisco International Airport – San Diego International Airport | 719 | 25.2 min | 50.7% | 71 |
| SYR DEN Syracuse Hancock International Airport – Denver International Airport | 2,395 | 0.5 min | 91.9% | 37 |
| SDF DEN Louisville Muhammad Ali International Airport – Denver International Airport | 1,644 | 7.1 min | 97.2% | 37 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 60 | 60 | 93.3% | 0 |
| November 2024 | 90 | 89 | 77.5% | 1 |
| December 2024 | 77 | 77 | 80.5% | 0 |
| January 2025 | 68 | 68 | 82.4% | 0 |
| February 2025 | 72 | 72 | 73.6% | 0 |
| March 2025 | 43 | 43 | 83.7% | 0 |
| April 2025 | 56 | 56 | 89.3% | 0 |
| May 2025 | 83 | 83 | 92.8% | 0 |
| June 2025 | 60 | 60 | 86.7% | 0 |
| July 2025 | 62 | 62 | 79.0% | 0 |
| August 2025 | 49 | 49 | 87.8% | 0 |
| September 2025 | 30 | 29 | 89.7% | 1 |
| October 2025 | 43 | 43 | 88.4% | 0 |
| November 2025 | 90 | 89 | 80.9% | 1 |
| December 2025 | 74 | 74 | 81.1% | 0 |
| January 2026 | 66 | 66 | 86.4% | 0 |
| February 2026 | 39 | 39 | 84.6% | 0 |
| March 2026 | 81 | 81 | 88.9% | 0 |
| April 2026 | 60 | 60 | 85.0% | 0 |
| May 2026 | 61 | 61 | 65.6% | 0 |
| June 2026 | 66 | 66 | 69.7% | 0 |
| July 2026 | 76 | 76 | 64.5% | 0 |