UA800
UA800 (United Airlines) is a multi-stop service on 9 routes, busiest Boston to Denver. Of 661 departures recorded from October 2024 to July 2026, 78.8% left on time, according to the US BTS.
- On-time departures78.8%of 661 flights
- Average delay15.2 min
- July 202630▼ 3.2%vs July 2025
- Cancelled1.1%
- Legs flown under this number9
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 | 23 | 23 | 0.0% |
| February | 19 | 25 | ▲ 31.6% |
| March | 47 | 31 | ▼ 34.0% |
| April | 26 | 30 | ▲ 15.4% |
| May | 31 | 31 | 0.0% |
| June | 30 | 30 | 0.0% |
| July | 31 | 30 | ▼ 3.2% |
| August | 31 | – | – |
| September | 53 | – | – |
| October | 30 | – | in progress |
| November | 24 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 207 | 200 | ▼ 3.4% |
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 | 82.6% | 90.5% | ▲ 9.5% |
| February | 89.5% | 83.3% | ▼ 6.9% |
| March | 72.3% | 87.1% | ▲ 20.4% |
| April | 84.6% | 83.3% | ▼ 1.5% |
| May | 54.8% | 87.1% | ▲ 58.8% |
| June | 86.2% | 90.0% | ▲ 4.4% |
| July | 61.3% | 70.0% | ▲ 14.2% |
| August | 74.2% | – | – |
| September | 77.4% | – | – |
| October | 66.7% | – | in progress |
| November | 79.2% | – | – |
| December | 79.3% | – | – |
| Year-to-date average (Jan–Jul) | 75.9% | 84.5% | ▲ 11.3% |
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 | 2 | – |
| February | 0 | 1 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 3 | ▲ 200.0% |
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 98.9% 654
- Cancelled 1.1% 7
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
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BOS DEN Boston Logan International Airport – Denver International Airport | 2,816 | 15.9 min | 79.4% | 490 |
| IAH BOS George Bush Intercontinental Airport – Boston Logan International Airport | 2,567 | 16.9 min | 73.5% | 103 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 85.0% | 0 |
| November 2024 | 29 | 29 | 75.9% | 0 |
| December 2024 | 38 | 35 | 88.6% | 3 |
| January 2025 | 23 | 23 | 82.6% | 0 |
| February 2025 | 19 | 19 | 89.5% | 0 |
| March 2025 | 47 | 47 | 72.3% | 0 |
| April 2025 | 26 | 26 | 84.6% | 0 |
| May 2025 | 31 | 31 | 54.8% | 0 |
| June 2025 | 30 | 29 | 86.2% | 1 |
| July 2025 | 31 | 31 | 61.3% | 0 |
| August 2025 | 31 | 31 | 74.2% | 0 |
| September 2025 | 53 | 53 | 77.4% | 0 |
| October 2025 | 30 | 30 | 66.7% | 0 |
| November 2025 | 24 | 24 | 79.2% | 0 |
| December 2025 | 29 | 29 | 79.3% | 0 |
| January 2026 | 23 | 21 | 90.5% | 2 |
| February 2026 | 25 | 24 | 83.3% | 1 |
| March 2026 | 31 | 31 | 87.1% | 0 |
| April 2026 | 30 | 30 | 83.3% | 0 |
| May 2026 | 31 | 31 | 87.1% | 0 |
| June 2026 | 30 | 30 | 90.0% | 0 |
| July 2026 | 30 | 30 | 70.0% | 0 |