UA1789
UA1789 (United Airlines) is a multi-stop service on 11 routes, busiest Dulles to San Antonio. Of 810 departures recorded from October 2024 to July 2026, 93.0% left on time, according to the US BTS.
- On-time departures93.0%of 810 flights
- Average delay0.6 min
- July 202656▲ 80.6%vs July 2025
- Cancelled0.7%
- Legs flown under this number11
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 | 24 | 48 | ▲ 100.0% |
| February | 20 | 46 | ▲ 130.0% |
| March | 25 | 80 | ▲ 220.0% |
| April | 26 | 72 | ▲ 176.9% |
| May | 26 | 60 | ▲ 130.8% |
| June | 21 | 56 | ▲ 166.7% |
| July | 31 | 56 | ▲ 80.6% |
| August | 24 | – | – |
| September | 21 | – | – |
| October | 24 | – | in progress |
| November | 30 | – | – |
| December | 41 | – | – |
| Year to date (Jan–Jul) | 173 | 418 | ▲ 141.6% |
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 | 95.7% | 85.1% | ▼ 11.0% |
| February | 95.0% | 93.5% | ▼ 1.6% |
| March | 88.0% | 91.1% | ▲ 3.6% |
| April | 96.2% | 93.0% | ▼ 3.3% |
| May | 92.3% | 95.0% | ▲ 2.9% |
| June | 100.0% | 96.4% | ▼ 3.6% |
| July | 90.3% | 94.6% | ▲ 4.7% |
| August | 95.8% | – | – |
| September | 95.2% | – | – |
| October | 100.0% | – | in progress |
| November | 93.3% | – | – |
| December | 90.2% | – | – |
| Year-to-date average (Jan–Jul) | 93.9% | 92.7% | ▼ 1.3% |
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 | 1 | 1 | 0.0% |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 1 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 5 | ▲ 400.0% |
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 99.3% 804
- Cancelled 0.7% 6
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| IAD SAT Washington Dulles International Airport – San Antonio International Airport | 2,189 | -0.9 min | 95.0% | 443 |
| RDU IAD Raleigh-Durham International Airport – Washington Dulles International Airport | 361 | -1.8 min | 96.3% | 167 |
| SAT DEN San Antonio International Airport – Denver International Airport | 1,280 | 8.9 min | 83.8% | 111 |
| DEN ELP Denver International Airport – El Paso International Airport | 908 | 7.0 min | 83.8% | 37 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 100.0% | 0 |
| November 2024 | 30 | 30 | 80.0% | 0 |
| December 2024 | 29 | 29 | 96.6% | 0 |
| January 2025 | 24 | 23 | 95.7% | 1 |
| February 2025 | 20 | 20 | 95.0% | 0 |
| March 2025 | 25 | 25 | 88.0% | 0 |
| April 2025 | 26 | 26 | 96.2% | 0 |
| May 2025 | 26 | 26 | 92.3% | 0 |
| June 2025 | 21 | 21 | 100.0% | 0 |
| July 2025 | 31 | 31 | 90.3% | 0 |
| August 2025 | 24 | 24 | 95.8% | 0 |
| September 2025 | 21 | 21 | 95.2% | 0 |
| October 2025 | 24 | 24 | 100.0% | 0 |
| November 2025 | 30 | 30 | 93.3% | 0 |
| December 2025 | 41 | 41 | 90.2% | 0 |
| January 2026 | 48 | 47 | 85.1% | 1 |
| February 2026 | 46 | 46 | 93.5% | 0 |
| March 2026 | 80 | 79 | 91.1% | 1 |
| April 2026 | 72 | 71 | 93.0% | 1 |
| May 2026 | 60 | 60 | 95.0% | 0 |
| June 2026 | 56 | 55 | 96.4% | 1 |
| July 2026 | 56 | 55 | 94.6% | 1 |