UA640
UA640 (United Airlines) flies Denver to Dallas-Fort Worth. Of 135 departures recorded from February 2025 to September 2025, 71.6% left on time, according to the US BTS.
Recorded departures by month
Short series — UA640 has only 8 months so far. Enough to show the level now, not enough to read a trend.
The most recent periods8 periods
| Period | Departures 2024 | Departures 2025 | Change vs last year |
|---|---|---|---|
| January | – | – | – |
| February | – | 12 | – |
| March | – | 5 | – |
| April | – | 21 | – |
| May | – | 15 | – |
| June | – | 22 | – |
| July | – | 22 | – |
| August | – | 21 | – |
| September | – | 17 | – |
| October | – | – | – |
| November | – | – | – |
| December | – | – | – |
according to the US BTS · February 2025 → September 2025
On-time departures by month
Short series — UA640 has only 8 months so far. Enough to show the level now, not enough to read a trend.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods8 periods
| Period | On time 2024 | On time 2025 | Change vs last year |
|---|---|---|---|
| January | – | – | – |
| February | – | 66.7% | – |
| March | – | 60.0% | – |
| April | – | 81.0% | – |
| May | – | 73.3% | – |
| June | – | 81.8% | – |
| July | – | 54.6% | – |
| August | – | 65.0% | – |
| September | – | 82.4% | – |
| October | – | – | – |
| November | – | – | – |
| December | – | – | – |
according to the US BTS · February 2025 → September 2025
Average departure delay by month
Short series — UA640 has only 8 months so far. Enough to show the level now, not enough to read a trend.
according to the US BTS · February 2025 → September 2025
Cancelled departures by month
Short series — UA640 has only 8 months so far. Enough to show the level now, not enough to read a trend.
The most recent periods8 periods
| Period | Cancelled 2024 | Cancelled 2025 | Change vs last year |
|---|---|---|---|
| January | – | – | – |
| February | – | 0 | – |
| March | – | 0 | – |
| April | – | 0 | – |
| May | – | 0 | – |
| June | – | 0 | – |
| July | – | 0 | – |
| August | – | 1 | – |
| September | – | 0 | – |
| October | – | – | – |
| November | – | – | – |
| December | – | – | – |
according to the US BTS · February 2025 → September 2025
This is a historical record of departures already flown, not a forecast for your flight.
Cancellation share
- Not cancelled 99.3% 134
- Cancelled 0.7% 1
Share of all recorded flights in the period, all legs. · Feb 13, 2025 → Sep 24, 2025
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DEN DFW Denver International Airport – Dallas Fort Worth International Airport | 1,032 | 21.3 min | 71.6% | 135 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| February 2025 | 12 | 12 | 66.7% | 0 |
| March 2025 | 5 | 5 | 60.0% | 0 |
| April 2025 | 21 | 21 | 81.0% | 0 |
| May 2025 | 15 | 15 | 73.3% | 0 |
| June 2025 | 22 | 22 | 81.8% | 0 |
| July 2025 | 22 | 22 | 54.6% | 0 |
| August 2025 | 21 | 20 | 65.0% | 1 |
| September 2025 | 17 | 17 | 82.4% | 0 |