UA1147
UA1147 (United Airlines) is a multi-stop service on 13 routes, busiest Dulles to San Francisco. Of 611 departures recorded from May 2025 to July 2026, 81.4% left on time, according to the US BTS.
- On-time departures81.4%of 611 flights
- Average delay12.4 min
- July 202659▼ 4.8%vs July 2025
- Cancelled0.5%
- Legs flown under this number13
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods15 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | 31 | – |
| February | – | 28 | – |
| March | – | 55 | – |
| April | – | 54 | – |
| May | 31 | 50 | ▲ 61.3% |
| June | 35 | 35 | 0.0% |
| July | 62 | 59 | ▼ 4.8% |
| August | 49 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 31 | – | – |
according to the US BTS · May 2025 → 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 periods15 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | 89.7% | – |
| February | – | 85.7% | – |
| March | – | 87.3% | – |
| April | – | 88.9% | – |
| May | 73.3% | 76.0% | ▲ 3.6% |
| June | 60.0% | 88.6% | ▲ 47.6% |
| July | 83.9% | 74.6% | ▼ 11.1% |
| August | 85.7% | – | – |
| September | 80.0% | – | – |
| October | 80.7% | – | in progress |
| November | 83.3% | – | – |
| December | 80.7% | – | – |
according to the US BTS · May 2025 → July 2026
Average departure delay by month
according to the US BTS · May 2025 → July 2026
Cancelled departures by month
The most recent periods15 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | 2 | – |
| February | – | 0 | – |
| March | – | 0 | – |
| April | – | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
according to the US BTS · May 2025 → 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 99.5% 608
- Cancelled 0.5% 3
Share of all recorded flights in the period, all legs. · May 1, 2025 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
8| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| IAD SFO Washington Dulles International Airport – San Francisco International Airport | 3,883 | 7.3 min | 88.7% | 205 |
| LAX BZN Los Angeles International Airport – Bozeman Yellowstone International Airport | 1,453 | 16.8 min | 78.0% | 91 |
| SFO PHX San Francisco International Airport – Phoenix Sky Harbor International Airport | 1,047 | 4.9 min | 82.1% | 67 |
| TPA LAX Tampa International Airport – Los Angeles International Airport | 3,466 | 6.4 min | 90.7% | 54 |
| DTW ORD Detroit Metropolitan Wayne County Airport – Chicago O'Hare International Airport | 376 | 15.6 min | 85.7% | 35 |
| DEN CLE Denver International Airport – Cleveland Hopkins International Airport | 1,928 | 40.8 min | 54.3% | 35 |
| SFO SAN San Francisco International Airport – San Diego International Airport | 719 | 19.4 min | 57.6% | 33 |
| CMH ORD John Glenn Columbus International Airport – Chicago O'Hare International Airport | 475 | 7.2 min | 77.4% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| May 2025 | 31 | 30 | 73.3% | 1 |
| June 2025 | 35 | 35 | 60.0% | 0 |
| July 2025 | 62 | 62 | 83.9% | 0 |
| August 2025 | 49 | 49 | 85.7% | 0 |
| September 2025 | 30 | 30 | 80.0% | 0 |
| October 2025 | 31 | 31 | 80.7% | 0 |
| November 2025 | 30 | 30 | 83.3% | 0 |
| December 2025 | 31 | 31 | 80.7% | 0 |
| January 2026 | 31 | 29 | 89.7% | 2 |
| February 2026 | 28 | 28 | 85.7% | 0 |
| March 2026 | 55 | 55 | 87.3% | 0 |
| April 2026 | 54 | 54 | 88.9% | 0 |
| May 2026 | 50 | 50 | 76.0% | 0 |
| June 2026 | 35 | 35 | 88.6% | 0 |
| July 2026 | 59 | 59 | 74.6% | 0 |