UA2136
UA2136 (United Airlines) is a multi-stop service on 9 routes, busiest Boston to Dulles. Of 829 departures recorded from October 2024 to July 2026, 73.2% left on time, according to the US BTS.
- On-time departures73.2%of 829 flights
- Average delay20.7 min
- July 202629▼ 52.5%vs July 2025
- Cancelled1.3%
- 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 | 29 | 31 | ▲ 6.9% |
| February | 40 | 24 | ▼ 40.0% |
| March | 36 | 32 | ▼ 11.1% |
| April | 60 | 59 | ▼ 1.7% |
| May | 53 | 31 | ▼ 41.5% |
| June | 35 | 30 | ▼ 14.3% |
| July | 61 | 29 | ▼ 52.5% |
| August | 31 | – | – |
| September | 53 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 314 | 236 | ▼ 24.8% |
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 | 85.7% | 82.8% | ▼ 3.4% |
| February | 80.0% | 100.0% | ▲ 25.0% |
| March | 83.3% | 76.7% | ▼ 8.0% |
| April | 93.3% | 69.5% | ▼ 25.5% |
| May | 64.2% | 83.9% | ▲ 30.7% |
| June | 45.7% | 69.0% | ▲ 50.9% |
| July | 63.3% | 46.4% | ▼ 26.7% |
| August | 61.3% | – | – |
| September | 58.5% | – | – |
| October | 54.8% | – | in progress |
| November | 75.0% | – | – |
| December | 89.7% | – | – |
| Year-to-date average (Jan–Jul) | 73.7% | 75.5% | ▲ 2.4% |
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 | 1 | 2 | ▲ 100.0% |
| February | 0 | 1 | – |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 1 | 1 | 0.0% |
| August | 0 | – | – |
| 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 98.7% 818
- Cancelled 1.3% 11
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 |
|---|---|---|---|---|
| BOS IAD Boston Logan International Airport – Washington Dulles International Airport | 663 | 22.7 min | 71.5% | 621 |
| SFO BOS San Francisco International Airport – Boston Logan International Airport | 4,341 | 8.2 min | 90.9% | 55 |
| IAD LAS Washington Dulles International Airport – Harry Reid International Airport | 3,316 | 23.3 min | 65.7% | 35 |
| IAH BOS George Bush Intercontinental Airport – Boston Logan International Airport | 2,567 | 13.3 min | 71.9% | 32 |
| IAD SFO Washington Dulles International Airport – San Francisco International Airport | 3,883 | 2.4 min | 93.3% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 24 | 24 | 91.7% | 0 |
| November 2024 | 54 | 54 | 75.9% | 0 |
| December 2024 | 28 | 27 | 81.5% | 1 |
| January 2025 | 29 | 28 | 85.7% | 1 |
| February 2025 | 40 | 40 | 80.0% | 0 |
| March 2025 | 36 | 36 | 83.3% | 0 |
| April 2025 | 60 | 60 | 93.3% | 0 |
| May 2025 | 53 | 53 | 64.2% | 0 |
| June 2025 | 35 | 35 | 45.7% | 0 |
| July 2025 | 61 | 60 | 63.3% | 1 |
| August 2025 | 31 | 31 | 61.3% | 0 |
| September 2025 | 53 | 53 | 58.5% | 0 |
| October 2025 | 31 | 31 | 54.8% | 0 |
| November 2025 | 29 | 28 | 75.0% | 1 |
| December 2025 | 29 | 29 | 89.7% | 0 |
| January 2026 | 31 | 29 | 82.8% | 2 |
| February 2026 | 24 | 23 | 100.0% | 1 |
| March 2026 | 32 | 30 | 76.7% | 2 |
| April 2026 | 59 | 59 | 69.5% | 0 |
| May 2026 | 31 | 31 | 83.9% | 0 |
| June 2026 | 30 | 29 | 69.0% | 1 |
| July 2026 | 29 | 28 | 46.4% | 1 |