UA2040
UA2040 (United Airlines) is a multi-stop service on 6 routes, busiest Boston to Chicago. Of 765 departures recorded from October 2024 to July 2026, 79.0% left on time, according to the US BTS.
- On-time departures79.0%of 765 flights
- Average delay18.2 min
- July 202630▼ 50.0%vs July 2025
- Cancelled1.6%
- Legs flown under this number6
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 | 31 | 31 | 0.0% |
| February | 28 | 28 | 0.0% |
| March | 31 | 31 | 0.0% |
| April | 30 | 30 | 0.0% |
| May | 62 | 31 | ▼ 50.0% |
| June | 60 | 30 | ▼ 50.0% |
| July | 60 | 30 | ▼ 50.0% |
| August | 49 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 31 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 302 | 211 | ▼ 30.1% |
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 | 93.6% | 92.9% | ▼ 0.7% |
| February | 89.3% | 96.3% | ▲ 7.9% |
| March | 83.9% | 83.3% | ▼ 0.6% |
| April | 96.6% | 90.0% | ▼ 6.8% |
| May | 74.2% | 87.1% | ▲ 17.4% |
| June | 65.0% | 69.0% | ▲ 6.1% |
| July | 50.9% | 69.0% | ▲ 35.6% |
| August | 72.3% | – | – |
| September | 63.3% | – | – |
| October | 80.7% | – | in progress |
| November | 80.0% | – | – |
| December | 80.7% | – | – |
| Year-to-date average (Jan–Jul) | 79.0% | 83.9% | ▲ 6.2% |
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 | 3 | – |
| February | 0 | 1 | – |
| March | 0 | 1 | – |
| April | 1 | 0 | ▼ 100.0% |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 1 | 1 | 0.0% |
| August | 2 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 7 | ▲ 250.0% |
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 98.4% 753
- Cancelled 1.6% 12
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
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BOS ORD Boston Logan International Airport – Chicago O'Hare International Airport | 1,391 | 14.7 min | 84.2% | 631 |
| ORD DEN Chicago O'Hare International Airport – Denver International Airport | 1,426 | 32.0 min | 52.1% | 74 |
| ORD MCI Chicago O'Hare International Airport – Kansas City International Airport | 647 | 49.6 min | 40.0% | 35 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 29 | 29 | 89.7% | 0 |
| December 2024 | 31 | 31 | 96.8% | 0 |
| January 2025 | 31 | 31 | 93.6% | 0 |
| February 2025 | 28 | 28 | 89.3% | 0 |
| March 2025 | 31 | 31 | 83.9% | 0 |
| April 2025 | 30 | 29 | 96.6% | 1 |
| May 2025 | 62 | 62 | 74.2% | 0 |
| June 2025 | 60 | 60 | 65.0% | 0 |
| July 2025 | 60 | 59 | 50.9% | 1 |
| August 2025 | 49 | 47 | 72.3% | 2 |
| September 2025 | 30 | 30 | 63.3% | 0 |
| October 2025 | 31 | 31 | 80.7% | 0 |
| November 2025 | 31 | 30 | 80.0% | 1 |
| December 2025 | 31 | 31 | 80.7% | 0 |
| January 2026 | 31 | 28 | 92.9% | 3 |
| February 2026 | 28 | 27 | 96.3% | 1 |
| March 2026 | 31 | 30 | 83.3% | 1 |
| April 2026 | 30 | 30 | 90.0% | 0 |
| May 2026 | 31 | 31 | 87.1% | 0 |
| June 2026 | 30 | 29 | 69.0% | 1 |
| July 2026 | 30 | 29 | 69.0% | 1 |