UA2640
UA2640 (United Airlines) is a multi-stop service on 15 routes, busiest Chicago to Washington. Of 698 departures recorded from October 2024 to July 2026, 85.3% left on time, according to the US BTS.
- On-time departures85.3%of 698 flights
- Average delay6.8 min
- July 202631
- Cancelled0.9%
- Legs flown under this number15
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 | 28 | 31 | ▲ 10.7% |
| February | 26 | 28 | ▲ 7.7% |
| March | 31 | 55 | ▲ 77.4% |
| April | 60 | 30 | ▼ 50.0% |
| May | 18 | 31 | ▲ 72.2% |
| June | – | 30 | – |
| July | – | 31 | – |
| August | 28 | – | – |
| September | 35 | – | – |
| October | 52 | – | in progress |
| November | 30 | – | – |
| December | 47 | – | – |
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 | 80.8% | 96.8% | ▲ 19.8% |
| February | 53.9% | 100.0% | ▲ 85.7% |
| March | 74.2% | 65.5% | ▼ 11.8% |
| April | 81.7% | 96.7% | ▲ 18.4% |
| May | 94.4% | 96.8% | ▲ 2.5% |
| June | – | 93.3% | – |
| July | – | 90.0% | – |
| August | 88.5% | – | – |
| September | 88.6% | – | – |
| October | 78.9% | – | in progress |
| November | 93.3% | – | – |
| December | 91.5% | – | – |
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 | 2 | 0 | ▼ 100.0% |
| February | 0 | 1 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | – | 0 | – |
| July | – | 1 | – |
| August | 2 | – | – |
| 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 99.1% 692
- Cancelled 0.9% 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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD DCA Chicago O'Hare International Airport – Ronald Reagan Washington National Airport | 983 | 11.3 min | 77.0% | 208 |
| DEN EWR Denver International Airport – Newark Liberty International Airport | 2,576 | 3.3 min | 92.3% | 170 |
| SEA SFO Seattle–Tacoma International Airport – San Francisco International Airport | 1,093 | 6.7 min | 86.8% | 121 |
| MCO IAH Orlando International Airport – George Bush Intercontinental Airport | 1,372 | -0.7 min | 97.3% | 37 |
| MCI ORD Kansas City International Airport – Chicago O'Hare International Airport | 647 | 15.0 min | 80.0% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 49 | 49 | 91.8% | 0 |
| November 2024 | 29 | 29 | 86.2% | 0 |
| December 2024 | 29 | 29 | 79.3% | 0 |
| January 2025 | 28 | 26 | 80.8% | 2 |
| February 2025 | 26 | 26 | 53.9% | 0 |
| March 2025 | 31 | 31 | 74.2% | 0 |
| April 2025 | 60 | 60 | 81.7% | 0 |
| May 2025 | 18 | 18 | 94.4% | 0 |
| August 2025 | 28 | 26 | 88.5% | 2 |
| September 2025 | 35 | 35 | 88.6% | 0 |
| October 2025 | 52 | 52 | 78.9% | 0 |
| November 2025 | 30 | 30 | 93.3% | 0 |
| December 2025 | 47 | 47 | 91.5% | 0 |
| January 2026 | 31 | 31 | 96.8% | 0 |
| February 2026 | 28 | 27 | 100.0% | 1 |
| March 2026 | 55 | 55 | 65.5% | 0 |
| April 2026 | 30 | 30 | 96.7% | 0 |
| May 2026 | 31 | 31 | 96.8% | 0 |
| June 2026 | 30 | 30 | 93.3% | 0 |
| July 2026 | 31 | 30 | 90.0% | 1 |