UA2123
UA2123 (United Airlines) is a multi-stop service on 3 routes, busiest Kansas City to Denver. Of 860 departures recorded from October 2024 to July 2026, 70.2% left on time, according to the US BTS.
- On-time departures70.2%of 860 flights
- Average delay20.9 min
- July 202661▲ 96.8%vs July 2025
- Cancelled0.6%
- Legs flown under this number3
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 | 56 | ▲ 80.6% |
| February | 28 | 54 | ▲ 92.9% |
| March | 31 | 62 | ▲ 100.0% |
| April | 30 | 60 | ▲ 100.0% |
| May | 31 | 51 | ▲ 64.5% |
| June | 30 | 36 | ▲ 20.0% |
| July | 31 | 61 | ▲ 96.8% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 37 | – | in progress |
| November | 58 | – | – |
| December | 32 | – | – |
| Year to date (Jan–Jul) | 212 | 380 | ▲ 79.2% |
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 | 82.1% | 76.8% | ▼ 6.5% |
| February | 78.6% | 79.6% | ▲ 1.3% |
| March | 77.4% | 74.2% | ▼ 4.2% |
| April | 66.7% | 76.7% | ▲ 15.0% |
| May | 53.3% | 64.7% | ▲ 21.3% |
| June | 33.3% | 47.2% | ▲ 41.7% |
| July | 64.5% | 45.9% | ▼ 28.9% |
| August | 58.1% | – | – |
| September | 76.7% | – | – |
| October | 73.0% | – | in progress |
| November | 73.7% | – | – |
| December | 75.0% | – | – |
| Year-to-date average (Jan–Jul) | 65.1% | 66.4% | ▲ 2.0% |
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 | 3 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 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% 855
- Cancelled 0.6% 5
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
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| MCI DEN Kansas City International Airport – Denver International Airport | 855 | 20.2 min | 73.5% | 564 |
| DEN SFO Denver International Airport – San Francisco International Airport | 1,553 | 23.4 min | 62.9% | 275 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 29 | 29 | 93.1% | 0 |
| December 2024 | 31 | 31 | 96.8% | 0 |
| January 2025 | 31 | 28 | 82.1% | 3 |
| February 2025 | 28 | 28 | 78.6% | 0 |
| March 2025 | 31 | 31 | 77.4% | 0 |
| April 2025 | 30 | 30 | 66.7% | 0 |
| May 2025 | 31 | 30 | 53.3% | 1 |
| June 2025 | 30 | 30 | 33.3% | 0 |
| July 2025 | 31 | 31 | 64.5% | 0 |
| August 2025 | 31 | 31 | 58.1% | 0 |
| September 2025 | 30 | 30 | 76.7% | 0 |
| October 2025 | 37 | 37 | 73.0% | 0 |
| November 2025 | 58 | 57 | 73.7% | 1 |
| December 2025 | 32 | 32 | 75.0% | 0 |
| January 2026 | 56 | 56 | 76.8% | 0 |
| February 2026 | 54 | 54 | 79.6% | 0 |
| March 2026 | 62 | 62 | 74.2% | 0 |
| April 2026 | 60 | 60 | 76.7% | 0 |
| May 2026 | 51 | 51 | 64.7% | 0 |
| June 2026 | 36 | 36 | 47.2% | 0 |
| July 2026 | 61 | 61 | 45.9% | 0 |