UA423
UA423 (United Airlines) is a multi-stop service on 17 routes, busiest Denver to Seattle. Of 420 departures recorded from October 2024 to March 2026, 82.3% left on time, according to the US BTS.
- On-time departures82.3%of 420 flights
- Average delay11.3 min
- March 202628▼ 22.2%vs March 2025
- Cancelled0.2%
- Legs flown under this number17
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods10 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 31 | 31 | 0.0% |
| February | 44 | 28 | ▼ 36.4% |
| March | 36 | 28 | ▼ 22.2% |
| April | 30 | – | – |
| May | – | – | – |
| June | – | – | – |
| July | – | – | – |
| August | – | – | – |
| September | – | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Mar) | 111 | 87 | ▼ 21.6% |
according to the US BTS · October 2024 → March 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 periods10 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 83.9% | 83.3% | ▼ 0.6% |
| February | 77.3% | 85.7% | ▲ 10.9% |
| March | 83.3% | 78.6% | ▼ 5.7% |
| April | 60.0% | – | – |
| May | – | – | – |
| June | – | – | – |
| July | – | – | – |
| August | – | – | – |
| September | – | – | – |
| October | 96.8% | – | in progress |
| November | 86.7% | – | – |
| December | 77.4% | – | – |
| Year-to-date average (Jan–Mar) | 81.5% | 82.5% | ▲ 1.3% |
according to the US BTS · October 2024 → March 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → March 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods10 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | – | – |
| May | – | – | – |
| June | – | – | – |
| July | – | – | – |
| August | – | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Mar) | 0 | 1 |
according to the US BTS · October 2024 → March 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% 419
- Cancelled 0.2% 1
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Mar 28, 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 |
|---|---|---|---|---|
| IAH DEN George Bush Intercontinental Airport – Denver International Airport | 1,387 | 5.7 min | 89.2% | 37 |
| EWR MCO Newark Liberty International Airport – Orlando International Airport | 1,511 | 3.1 min | 86.1% | 37 |
| EWR DEN Newark Liberty International Airport – Denver International Airport | 2,576 | 10.2 min | 78.4% | 37 |
| DEN SEA Denver International Airport – Seattle–Tacoma International Airport | 1,645 | 6.7 min | 86.5% | 37 |
| EUG SFO Eugene Airport – San Francisco International Airport | 727 | 7.3 min | 76.5% | 34 |
| DEN MCI Denver International Airport – Kansas City International Airport | 855 | 21.6 min | 59.4% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 39 | 39 | 89.7% | 0 |
| November 2024 | 30 | 30 | 83.3% | 0 |
| December 2024 | 31 | 31 | 83.9% | 0 |
| January 2025 | 31 | 31 | 83.9% | 0 |
| February 2025 | 44 | 44 | 77.3% | 0 |
| March 2025 | 36 | 36 | 83.3% | 0 |
| April 2025 | 30 | 30 | 60.0% | 0 |
| October 2025 | 31 | 31 | 96.8% | 0 |
| November 2025 | 30 | 30 | 86.7% | 0 |
| December 2025 | 31 | 31 | 77.4% | 0 |
| January 2026 | 31 | 30 | 83.3% | 1 |
| February 2026 | 28 | 28 | 85.7% | 0 |
| March 2026 | 28 | 28 | 78.6% | 0 |