UA1540
UA1540 (United Airlines) is a multi-stop service on 16 routes, busiest Houston to Washington. Of 686 departures recorded from October 2024 to July 2026, 85.7% left on time, according to the US BTS.
- On-time departures85.7%of 686 flights
- Average delay7.7 min
- July 202631
- Cancelled0.4%
- Legs flown under this number16
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 10 | 8 | ▼ 20.0% |
| February | 14 | 32 | ▲ 128.6% |
| March | 44 | 31 | ▼ 29.5% |
| April | – | 2 | – |
| May | 38 | 45 | ▲ 18.4% |
| June | 49 | 30 | ▼ 38.8% |
| July | – | 31 | – |
| August | 24 | – | – |
| September | 56 | – | – |
| October | 58 | – | in progress |
| November | 55 | – | – |
| December | 56 | – | – |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 88.9% | 75.0% | ▼ 15.6% |
| February | 61.5% | 93.8% | ▲ 52.3% |
| March | 77.3% | 83.9% | ▲ 8.5% |
| April | – | 0.0% | – |
| May | 60.5% | 84.4% | ▲ 39.5% |
| June | 72.9% | 86.7% | ▲ 18.9% |
| July | – | 93.6% | – |
| August | 83.3% | – | – |
| September | 94.6% | – | – |
| October | 87.9% | – | in progress |
| November | 90.9% | – | – |
| December | 91.1% | – | – |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 0 | ▼ 100.0% |
| February | 1 | 0 | ▼ 100.0% |
| March | 0 | 0 | – |
| April | – | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | – | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 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 99.6% 683
- Cancelled 0.4% 3
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
8| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| IAH DCA George Bush Intercontinental Airport – Ronald Reagan Washington National Airport | 1,942 | 13.0 min | 76.7% | 207 |
| SMF IAH Sacramento International Airport – George Bush Intercontinental Airport | 2,586 | 2.0 min | 97.1% | 140 |
| PHX IAH Phoenix Sky Harbor International Airport – George Bush Intercontinental Airport | 1,620 | 5.5 min | 84.6% | 53 |
| IAH BNA George Bush Intercontinental Airport – Nashville International Airport | 1,057 | 16.0 min | 79.3% | 53 |
| SAT IAH San Antonio International Airport – George Bush Intercontinental Airport | 306 | -2.6 min | 94.2% | 52 |
| DCA ORD Ronald Reagan Washington National Airport – Chicago O'Hare International Airport | 983 | 9.9 min | 80.6% | 37 |
| DEN AVL Denver International Airport – Asheville Regional Airport | 2,004 | 5.5 min | 85.7% | 35 |
| FLL SFO Fort Lauderdale Hollywood International Airport – San Francisco International Airport | 4,151 | 2.1 min | 93.6% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 32 | 32 | 93.8% | 0 |
| November 2024 | 30 | 30 | 93.3% | 0 |
| December 2024 | 41 | 41 | 95.1% | 0 |
| January 2025 | 10 | 9 | 88.9% | 1 |
| February 2025 | 14 | 13 | 61.5% | 1 |
| March 2025 | 44 | 44 | 77.3% | 0 |
| May 2025 | 38 | 38 | 60.5% | 0 |
| June 2025 | 49 | 48 | 72.9% | 1 |
| August 2025 | 24 | 24 | 83.3% | 0 |
| September 2025 | 56 | 56 | 94.6% | 0 |
| October 2025 | 58 | 58 | 87.9% | 0 |
| November 2025 | 55 | 55 | 90.9% | 0 |
| December 2025 | 56 | 56 | 91.1% | 0 |
| January 2026 | 8 | 8 | 75.0% | 0 |
| February 2026 | 32 | 32 | 93.8% | 0 |
| March 2026 | 31 | 31 | 83.9% | 0 |
| April 2026 | 2 | 2 | 0.0% | 0 |
| May 2026 | 45 | 45 | 84.4% | 0 |
| June 2026 | 30 | 30 | 86.7% | 0 |
| July 2026 | 31 | 31 | 93.6% | 0 |