UA1535
UA1535 (United Airlines) is a multi-stop service on 11 routes, busiest Dulles to Houston. Of 1,006 departures recorded from October 2024 to July 2026, 82.0% left on time, according to the US BTS.
- On-time departures82.0%of 1,006 flights
- Average delay11.9 min
- July 202693▲ 200.0%vs July 2025
- Cancelled0.6%
- Legs flown under this number11
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 36 | ▲ 16.1% |
| February | 28 | 28 | 0.0% |
| March | 31 | 85 | ▲ 174.2% |
| April | 30 | 90 | ▲ 200.0% |
| May | 21 | 93 | ▲ 342.9% |
| June | 5 | 90 | ▲ 1,700.0% |
| July | 31 | 93 | ▲ 200.0% |
| August | 31 | – | – |
| September | 27 | – | – |
| October | 87 | – | in progress |
| November | 30 | – | – |
| December | 44 | – | – |
| Year to date (Jan–Jul) | 177 | 515 | ▲ 191.0% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 70.0% | 91.4% | ▲ 30.6% |
| February | 96.4% | 92.9% | ▼ 3.7% |
| March | 93.6% | 75.0% | ▼ 19.8% |
| April | 100.0% | 88.9% | ▼ 11.1% |
| May | 90.5% | 82.6% | ▼ 8.7% |
| June | 100.0% | 74.4% | ▼ 25.6% |
| July | 77.4% | 68.5% | ▼ 11.5% |
| August | 77.4% | – | – |
| September | 92.6% | – | – |
| October | 77.0% | – | in progress |
| November | 86.7% | – | – |
| December | 84.1% | – | – |
| Year-to-date average (Jan–Jul) | 89.7% | 82.0% | ▼ 8.6% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 0 | – |
| May | 0 | 1 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 4 | ▲ 100.0% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
This number flies several legs
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 99.4% 1,000
- Cancelled 0.6% 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
88 of 8
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| IAD IAH Washington Dulles International Airport – George Bush Intercontinental Airport | 1,913 | 9.9 min | 86.3% | 420 |
| IAH DFW George Bush Intercontinental Airport – Dallas Fort Worth International Airport | 362 | 28.5 min | 69.0% | 188 |
| RDU IAD Raleigh-Durham International Airport – Washington Dulles International Airport | 361 | 4.7 min | 86.5% | 149 |
| SNA ORD John Wayne Orange County International Airport – Chicago O'Hare International Airport | 2,772 | -0.5 min | 91.0% | 67 |
| DFW DEN Dallas Fort Worth International Airport – Denver International Airport | 1,032 | 4.8 min | 86.1% | 37 |
| IAH MSY George Bush Intercontinental Airport – Louis Armstrong New Orleans International Airport | 489 | 2.0 min | 85.3% | 34 |
| ORD GRR Chicago O'Hare International Airport – Gerald R. Ford International Airport | 220 | 22.8 min | 63.6% | 33 |
| IAH SFO George Bush Intercontinental Airport – San Francisco International Airport | 2,627 | 11.6 min | 83.9% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 35 | 35 | 88.6% | 0 |
| November 2024 | 29 | 29 | 82.8% | 0 |
| December 2024 | 31 | 31 | 80.7% | 0 |
| January 2025 | 31 | 30 | 70.0% | 1 |
| February 2025 | 28 | 28 | 96.4% | 0 |
| March 2025 | 31 | 31 | 93.6% | 0 |
| April 2025 | 30 | 30 | 100.0% | 0 |
| May 2025 | 21 | 21 | 90.5% | 0 |
| June 2025 | 5 | 4 | 100.0% | 1 |
| July 2025 | 31 | 31 | 77.4% | 0 |
| August 2025 | 31 | 31 | 77.4% | 0 |
| September 2025 | 27 | 27 | 92.6% | 0 |
| October 2025 | 87 | 87 | 77.0% | 0 |
| November 2025 | 30 | 30 | 86.7% | 0 |
| December 2025 | 44 | 44 | 84.1% | 0 |
| January 2026 | 36 | 35 | 91.4% | 1 |
| February 2026 | 28 | 28 | 92.9% | 0 |
| March 2026 | 85 | 84 | 75.0% | 1 |
| April 2026 | 90 | 90 | 88.9% | 0 |
| May 2026 | 93 | 92 | 82.6% | 1 |
| June 2026 | 90 | 90 | 74.4% | 0 |
| July 2026 | 93 | 92 | 68.5% | 1 |