UA1015
UA1015 (United Airlines) is a multi-stop service on 14 routes, busiest Boston to Chicago. Of 690 departures recorded from October 2024 to July 2026, 69.5% left on time, according to the US BTS.
- On-time departures69.5%of 690 flights
- Average delay26.4 min
- July 202652▲ 73.3%vs July 2025
- Cancelled2.5%
- Legs flown under this number14
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 | 19 | 27 | ▲ 42.1% |
| February | 16 | 19 | ▲ 18.8% |
| March | 29 | 19 | ▼ 34.5% |
| April | 16 | 47 | ▲ 193.8% |
| May | 21 | 52 | ▲ 147.6% |
| June | 30 | 84 | ▲ 180.0% |
| July | 30 | 52 | ▲ 73.3% |
| August | 34 | – | – |
| September | 40 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 161 | 300 | ▲ 86.3% |
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 | 79.0% | 76.9% | ▼ 2.6% |
| February | 75.0% | 77.8% | ▲ 3.7% |
| March | 89.7% | 70.6% | ▼ 21.3% |
| April | 68.8% | 77.8% | ▲ 13.1% |
| May | 66.7% | 78.9% | ▲ 18.3% |
| June | 63.3% | 74.7% | ▲ 18.0% |
| July | 40.0% | 73.5% | ▲ 83.7% |
| August | 62.5% | – | – |
| September | 53.9% | – | – |
| October | 36.7% | – | in progress |
| November | 69.2% | – | – |
| December | 67.7% | – | – |
| Year-to-date average (Jan–Jul) | 68.9% | 75.7% | ▲ 9.9% |
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 | 1 | – |
| February | 0 | 1 | – |
| March | 0 | 2 | – |
| April | 0 | 2 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 0 | 3 | – |
| August | 2 | – | – |
| September | 1 | – | – |
| October | 1 | – | in progress |
| November | 3 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 10 |
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 97.5% 673
- Cancelled 2.5% 17
Share of all recorded flights in the period, all legs. · Oct 27, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BOS ORD Boston Logan International Airport – Chicago O'Hare International Airport | 1,391 | 36.0 min | 62.1% | 463 |
| SFO BOS San Francisco International Airport – Boston Logan International Airport | 4,341 | -2.4 min | 96.3% | 81 |
| IAH IAD George Bush Intercontinental Airport – Washington Dulles International Airport | 1,913 | 14.6 min | 70.3% | 37 |
| ORD IAD Chicago O'Hare International Airport – Washington Dulles International Airport | 945 | 20.5 min | 68.6% | 35 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 5 | 5 | 40.0% | 0 |
| November 2024 | 30 | 30 | 73.3% | 0 |
| December 2024 | 29 | 29 | 82.8% | 0 |
| January 2025 | 19 | 19 | 79.0% | 0 |
| February 2025 | 16 | 16 | 75.0% | 0 |
| March 2025 | 29 | 29 | 89.7% | 0 |
| April 2025 | 16 | 16 | 68.8% | 0 |
| May 2025 | 21 | 21 | 66.7% | 0 |
| June 2025 | 30 | 30 | 63.3% | 0 |
| July 2025 | 30 | 30 | 40.0% | 0 |
| August 2025 | 34 | 32 | 62.5% | 2 |
| September 2025 | 40 | 39 | 53.9% | 1 |
| October 2025 | 31 | 30 | 36.7% | 1 |
| November 2025 | 29 | 26 | 69.2% | 3 |
| December 2025 | 31 | 31 | 67.7% | 0 |
| January 2026 | 27 | 26 | 76.9% | 1 |
| February 2026 | 19 | 18 | 77.8% | 1 |
| March 2026 | 19 | 17 | 70.6% | 2 |
| April 2026 | 47 | 45 | 77.8% | 2 |
| May 2026 | 52 | 52 | 78.9% | 0 |
| June 2026 | 84 | 83 | 74.7% | 1 |
| July 2026 | 52 | 49 | 73.5% | 3 |