UA539
UA539 (United Airlines) is a multi-stop service on 24 routes, busiest Dallas-Fort Worth to Houston. Of 903 departures recorded from October 2024 to July 2026, 86.3% left on time, according to the US BTS.
- On-time departures86.3%of 903 flights
- Average delay8.8 min
- July 202657▲ 83.9%vs July 2025
- Cancelled0.7%
- Legs flown under this number24
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 | 37 | ▲ 19.4% |
| February | 28 | 46 | ▲ 64.3% |
| March | 31 | 62 | ▲ 100.0% |
| April | 30 | 81 | ▲ 170.0% |
| May | 31 | 56 | ▲ 80.6% |
| June | 35 | 56 | ▲ 60.0% |
| July | 31 | 57 | ▲ 83.9% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 36 | – | in progress |
| November | 45 | – | – |
| December | 40 | – | – |
| Year to date (Jan–Jul) | 217 | 395 | ▲ 82.0% |
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 | 77.4% | 94.4% | ▲ 22.0% |
| February | 89.3% | 91.3% | ▲ 2.3% |
| March | 96.8% | 83.9% | ▼ 13.3% |
| April | 76.7% | 91.4% | ▲ 19.2% |
| May | 80.7% | 87.5% | ▲ 8.5% |
| June | 68.6% | 76.8% | ▲ 12.0% |
| July | 64.5% | 89.5% | ▲ 38.7% |
| August | 87.1% | – | – |
| September | 93.3% | – | – |
| October | 97.2% | – | in progress |
| November | 87.5% | – | – |
| December | 87.5% | – | – |
| Year-to-date average (Jan–Jul) | 79.1% | 87.8% | ▲ 11.0% |
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 | 0 | 1 | – |
| 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 | 5 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 1 |
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 99.3% 897
- 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
99 of 9
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DFW IAH Dallas Fort Worth International Airport – George Bush Intercontinental Airport | 362 | 9.6 min | 87.2% | 231 |
| ORD DFW Chicago O'Hare International Airport – Dallas Fort Worth International Airport | 1,291 | 3.8 min | 87.2% | 212 |
| FLL SFO Fort Lauderdale Hollywood International Airport – San Francisco International Airport | 4,151 | 8.0 min | 87.1% | 62 |
| ORD OMA Chicago O'Hare International Airport – Eppley Airfield | 668 | 5.6 min | 89.1% | 46 |
| SFO SAN San Francisco International Airport – San Diego International Airport | 719 | -4.1 min | 94.7% | 38 |
| EWR PWM Newark Liberty International Airport – Portland International Jetport | 458 | 8.0 min | 81.1% | 37 |
| CLE ORD Cleveland Hopkins International Airport – Chicago O'Hare International Airport | 507 | 1.7 min | 94.6% | 37 |
| BOS IAD Boston Logan International Airport – Washington Dulles International Airport | 663 | 61.3 min | 69.4% | 36 |
| PHL ORD Philadelphia International Airport – Chicago O'Hare International Airport | 1,088 | 0.2 min | 88.6% | 35 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 25 | 25 | 96.0% | 0 |
| November 2024 | 51 | 51 | 88.2% | 0 |
| December 2024 | 33 | 33 | 87.9% | 0 |
| January 2025 | 31 | 31 | 77.4% | 0 |
| February 2025 | 28 | 28 | 89.3% | 0 |
| March 2025 | 31 | 31 | 96.8% | 0 |
| April 2025 | 30 | 30 | 76.7% | 0 |
| May 2025 | 31 | 31 | 80.7% | 0 |
| June 2025 | 35 | 35 | 68.6% | 0 |
| July 2025 | 31 | 31 | 64.5% | 0 |
| August 2025 | 31 | 31 | 87.1% | 0 |
| September 2025 | 30 | 30 | 93.3% | 0 |
| October 2025 | 36 | 36 | 97.2% | 0 |
| November 2025 | 45 | 40 | 87.5% | 5 |
| December 2025 | 40 | 40 | 87.5% | 0 |
| January 2026 | 37 | 36 | 94.4% | 1 |
| February 2026 | 46 | 46 | 91.3% | 0 |
| March 2026 | 62 | 62 | 83.9% | 0 |
| April 2026 | 81 | 81 | 91.4% | 0 |
| May 2026 | 56 | 56 | 87.5% | 0 |
| June 2026 | 56 | 56 | 76.8% | 0 |
| July 2026 | 57 | 57 | 89.5% | 0 |