UA1587
UA1587 (United Airlines) is a multi-stop service on 11 routes, busiest Dulles to Denver. Of 832 departures recorded from October 2024 to July 2026, 85.9% left on time, according to the US BTS.
- On-time departures85.9%of 832 flights
- Average delay10.3 min
- July 202631▲ 0.0%vs July 2025
- Cancelled0.2%
- 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 | 33 | 31 | ▼ 6.1% |
| February | 26 | 28 | ▲ 7.7% |
| March | 30 | 58 | ▲ 93.3% |
| April | 30 | 59 | ▲ 96.7% |
| May | 31 | 42 | ▲ 35.5% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 80 | – | – |
| October | 55 | – | in progress |
| November | 59 | – | – |
| December | 32 | – | – |
| Year to date (Jan–Jul) | 211 | 279 | ▲ 32.2% |
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 | 78.8% | 87.1% | ▲ 10.5% |
| February | 80.0% | 85.7% | ▲ 7.1% |
| March | 83.3% | 74.1% | ▼ 11.0% |
| April | 96.7% | 93.2% | ▼ 3.6% |
| May | 87.1% | 97.6% | ▲ 12.1% |
| June | 86.7% | 93.3% | ▲ 7.7% |
| July | 93.6% | 83.9% | ▼ 10.3% |
| August | 93.3% | – | – |
| September | 91.3% | – | – |
| October | 89.1% | – | in progress |
| November | 89.8% | – | – |
| December | 81.3% | – | – |
| Year-to-date average (Jan–Jul) | 86.6% | 87.9% | ▲ 1.5% |
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 | 0 | 0 | – |
| February | 1 | 0 | ▼ 100.0% |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 0 | ▼ 100.0% |
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 99.8% 830
- Cancelled 0.2% 2
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| IAD DEN Washington Dulles International Airport – Denver International Airport | 2,332 | 4.5 min | 90.8% | 415 |
| DEN IAH Denver International Airport – George Bush Intercontinental Airport | 1,387 | 8.6 min | 84.8% | 125 |
| RDU EWR Raleigh-Durham International Airport – Newark Liberty International Airport | 670 | 37.0 min | 70.0% | 111 |
| DEN BOS Denver International Airport – Boston Logan International Airport | 2,816 | 15.7 min | 80.8% | 52 |
| FLL EWR Fort Lauderdale Hollywood International Airport – Newark Liberty International Airport | 1,717 | 3.8 min | 83.8% | 37 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 85.0% | 0 |
| November 2024 | 29 | 29 | 51.7% | 0 |
| December 2024 | 36 | 36 | 72.2% | 0 |
| January 2025 | 33 | 33 | 78.8% | 0 |
| February 2025 | 26 | 25 | 80.0% | 1 |
| March 2025 | 30 | 30 | 83.3% | 0 |
| April 2025 | 30 | 30 | 96.7% | 0 |
| May 2025 | 31 | 31 | 87.1% | 0 |
| June 2025 | 30 | 30 | 86.7% | 0 |
| July 2025 | 31 | 31 | 93.6% | 0 |
| August 2025 | 31 | 30 | 93.3% | 1 |
| September 2025 | 80 | 80 | 91.3% | 0 |
| October 2025 | 55 | 55 | 89.1% | 0 |
| November 2025 | 59 | 59 | 89.8% | 0 |
| December 2025 | 32 | 32 | 81.3% | 0 |
| January 2026 | 31 | 31 | 87.1% | 0 |
| February 2026 | 28 | 28 | 85.7% | 0 |
| March 2026 | 58 | 58 | 74.1% | 0 |
| April 2026 | 59 | 59 | 93.2% | 0 |
| May 2026 | 42 | 42 | 97.6% | 0 |
| June 2026 | 30 | 30 | 93.3% | 0 |
| July 2026 | 31 | 31 | 83.9% | 0 |