UA1228
UA1228 (United Airlines) is a multi-stop service on 13 routes, busiest Las Vegas to Dulles. Of 705 departures recorded from October 2024 to July 2026, 87.3% left on time, according to the US BTS.
- On-time departures87.3%of 705 flights
- Average delay7.2 min
- July 202631▲ 3.3%vs July 2025
- Cancelled0.7%
- 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 | 53 | 31 | ▼ 41.5% |
| February | 54 | 27 | ▼ 50.0% |
| March | 36 | 31 | ▼ 13.9% |
| April | 30 | 30 | 0.0% |
| May | 31 | 31 | 0.0% |
| June | 30 | 30 | 0.0% |
| July | 30 | 31 | ▲ 3.3% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 264 | 211 | ▼ 20.1% |
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 | 82.7% | 90.0% | ▲ 8.8% |
| February | 81.5% | 92.6% | ▲ 13.6% |
| March | 91.4% | 96.8% | ▲ 5.8% |
| April | 79.3% | 80.0% | ▲ 0.9% |
| May | 93.6% | 86.7% | ▼ 7.4% |
| June | 90.0% | 53.3% | ▼ 40.7% |
| July | 90.0% | 61.3% | ▼ 31.9% |
| August | 93.6% | – | – |
| September | 100.0% | – | – |
| October | 96.8% | – | in progress |
| November | 90.0% | – | – |
| December | 96.8% | – | – |
| Year-to-date average (Jan–Jul) | 86.9% | 80.1% | ▼ 7.9% |
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 | 1 | 1 | 0.0% |
| February | 0 | 0 | – |
| March | 1 | 0 | ▼ 100.0% |
| April | 1 | 0 | ▼ 100.0% |
| May | 0 | 1 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 3 | 2 | ▼ 33.3% |
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 99.3% 700
- Cancelled 0.7% 5
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| LAS IAD Harry Reid International Airport – Washington Dulles International Airport | 3,316 | -3.0 min | 95.5% | 202 |
| DEN HDN Denver International Airport – Yampa Valley Airport | 227 | 8.0 min | 83.8% | 114 |
| LIH LAX Lihue Airport – Los Angeles International Airport | 4,203 | 6.1 min | 92.6% | 108 |
| EWR IAD Newark Liberty International Airport – Washington Dulles International Airport | 341 | -2.0 min | 93.8% | 64 |
| DEN DAY Denver International Airport – James M. Cox Dayton International Airport | 1,742 | 37.9 min | 64.9% | 37 |
| BZN DEN Bozeman Yellowstone International Airport – Denver International Airport | 844 | 11.9 min | 84.4% | 32 |
| BOI DEN Boise Air Terminal/Gowen Field – Denver International Airport | 1,042 | 2.7 min | 83.3% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 94.1% | 0 |
| November 2024 | 29 | 29 | 89.7% | 0 |
| December 2024 | 31 | 31 | 100.0% | 0 |
| January 2025 | 53 | 52 | 82.7% | 1 |
| February 2025 | 54 | 54 | 81.5% | 0 |
| March 2025 | 36 | 35 | 91.4% | 1 |
| April 2025 | 30 | 29 | 79.3% | 1 |
| May 2025 | 31 | 31 | 93.6% | 0 |
| June 2025 | 30 | 30 | 90.0% | 0 |
| July 2025 | 30 | 30 | 90.0% | 0 |
| August 2025 | 31 | 31 | 93.6% | 0 |
| September 2025 | 30 | 30 | 100.0% | 0 |
| October 2025 | 31 | 31 | 96.8% | 0 |
| November 2025 | 30 | 30 | 90.0% | 0 |
| December 2025 | 31 | 31 | 96.8% | 0 |
| January 2026 | 31 | 30 | 90.0% | 1 |
| February 2026 | 27 | 27 | 92.6% | 0 |
| March 2026 | 31 | 31 | 96.8% | 0 |
| April 2026 | 30 | 30 | 80.0% | 0 |
| May 2026 | 31 | 30 | 86.7% | 1 |
| June 2026 | 30 | 30 | 53.3% | 0 |
| July 2026 | 31 | 31 | 61.3% | 0 |