UA1524
UA1524 (United Airlines) is a multi-stop service on 8 routes, busiest Dulles to Houston. Of 964 departures recorded from October 2024 to July 2026, 89.4% left on time, according to the US BTS.
- On-time departures89.4%of 964 flights
- Average delay5.4 min
- July 202693▲ 200.0%vs July 2025
- Cancelled0.5%
- Legs flown under this number8
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 | 41 | ▲ 32.3% |
| February | 28 | 45 | ▲ 60.7% |
| March | 31 | 62 | ▲ 100.0% |
| April | 30 | 74 | ▲ 146.7% |
| May | 31 | 93 | ▲ 200.0% |
| June | 30 | 90 | ▲ 200.0% |
| July | 31 | 93 | ▲ 200.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 58 | – | – |
| Year to date (Jan–Jul) | 212 | 498 | ▲ 134.9% |
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 | 79.3% | 84.6% | ▲ 6.7% |
| February | 92.9% | 95.6% | ▲ 2.9% |
| March | 93.6% | 83.9% | ▼ 10.3% |
| April | 86.7% | 90.5% | ▲ 4.5% |
| May | 96.8% | 90.3% | ▼ 6.7% |
| June | 93.3% | 86.7% | ▼ 7.1% |
| July | 93.6% | 89.3% | ▼ 4.6% |
| August | 100.0% | – | – |
| September | 96.7% | – | – |
| October | 96.8% | – | in progress |
| November | 93.3% | – | – |
| December | 91.4% | – | – |
| Year-to-date average (Jan–Jul) | 90.9% | 88.7% | ▼ 2.4% |
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 | 2 | 2 | 0.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 2 | 0.0% |
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 99.5% 959
- Cancelled 0.5% 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
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| IAD IAH Washington Dulles International Airport – George Bush Intercontinental Airport | 1,913 | 5.9 min | 90.1% | 590 |
| IAH LAS George Bush Intercontinental Airport – Harry Reid International Airport | 1,963 | 6.3 min | 86.8% | 220 |
| ORF IAD Norfolk International Airport – Washington Dulles International Airport | 253 | 0.5 min | 93.7% | 111 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 94.7% | 0 |
| November 2024 | 23 | 23 | 73.9% | 0 |
| December 2024 | 32 | 31 | 64.5% | 1 |
| January 2025 | 31 | 29 | 79.3% | 2 |
| February 2025 | 28 | 28 | 92.9% | 0 |
| March 2025 | 31 | 31 | 93.6% | 0 |
| April 2025 | 30 | 30 | 86.7% | 0 |
| May 2025 | 31 | 31 | 96.8% | 0 |
| June 2025 | 30 | 30 | 93.3% | 0 |
| July 2025 | 31 | 31 | 93.6% | 0 |
| August 2025 | 31 | 31 | 100.0% | 0 |
| September 2025 | 30 | 30 | 96.7% | 0 |
| October 2025 | 31 | 31 | 96.8% | 0 |
| November 2025 | 30 | 30 | 93.3% | 0 |
| December 2025 | 58 | 58 | 91.4% | 0 |
| January 2026 | 41 | 39 | 84.6% | 2 |
| February 2026 | 45 | 45 | 95.6% | 0 |
| March 2026 | 62 | 62 | 83.9% | 0 |
| April 2026 | 74 | 74 | 90.5% | 0 |
| May 2026 | 93 | 93 | 90.3% | 0 |
| June 2026 | 90 | 90 | 86.7% | 0 |
| July 2026 | 93 | 93 | 89.3% | 0 |