UA577
UA577 (United Airlines) is a multi-stop service on 22 routes, busiest Newark to Boston. Of 774 departures recorded from October 2024 to July 2026, 82.3% left on time, according to the US BTS.
- On-time departures82.3%of 774 flights
- Average delay15.1 min
- July 202661▲ 13.0%vs July 2025
- Cancelled1.6%
- Legs flown under this number22
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 30 | 58 | ▲ 93.3% |
| February | 28 | 36 | ▲ 28.6% |
| March | 31 | 31 | 0.0% |
| April | 30 | 27 | ▼ 10.0% |
| May | 41 | 31 | ▼ 24.4% |
| June | 39 | 36 | ▼ 7.7% |
| July | 54 | 61 | ▲ 13.0% |
| August | 31 | – | – |
| September | 29 | – | – |
| October | 23 | – | in progress |
| November | 30 | – | – |
| December | 36 | – | – |
| Year to date (Jan–Jul) | 253 | 280 | ▲ 10.7% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 86.7% | 89.1% | ▲ 2.8% |
| February | 64.3% | 91.4% | ▲ 42.2% |
| March | 87.1% | 83.3% | ▼ 4.3% |
| April | 96.7% | 81.5% | ▼ 15.7% |
| May | 70.7% | 100.0% | ▲ 41.4% |
| June | 74.4% | 97.2% | ▲ 30.7% |
| July | 77.4% | 90.0% | ▲ 16.3% |
| August | 77.4% | – | – |
| September | 42.9% | – | – |
| October | 86.4% | – | in progress |
| November | 77.8% | – | – |
| December | 83.3% | – | – |
| Year-to-date average (Jan–Jul) | 79.6% | 90.4% | ▲ 13.5% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 3 | – |
| February | 0 | 1 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 1 | 0.0% |
| August | 0 | – | – |
| September | 1 | – | – |
| October | 1 | – | in progress |
| November | 3 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 6 | ▲ 500.0% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
This number flies several legs
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 98.4% 762
- 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
88 of 8
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| EWR BOS Newark Liberty International Airport – Boston Logan International Airport | 322 | 14.4 min | 79.3% | 221 |
| EWR DEN Newark Liberty International Airport – Denver International Airport | 2,576 | 16.2 min | 91.7% | 109 |
| MCO EWR Orlando International Airport – Newark Liberty International Airport | 1,511 | 12.7 min | 84.6% | 52 |
| BOS IAH Boston Logan International Airport – George Bush Intercontinental Airport | 2,567 | 30.4 min | 56.9% | 52 |
| DEN GEG Denver International Airport – Spokane International Airport | 1,343 | 0.3 min | 90.2% | 51 |
| AUS EWR Austin Bergstrom International Airport – Newark Liberty International Airport | 2,416 | 10.8 min | 88.0% | 50 |
| FLL EWR Fort Lauderdale Hollywood International Airport – Newark Liberty International Airport | 1,717 | -5.0 min | 97.1% | 36 |
| DEN SNA Denver International Airport – John Wayne Orange County International Airport | 1,360 | -2.7 min | 96.9% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 35 | 35 | 85.7% | 0 |
| November 2024 | 29 | 29 | 82.8% | 0 |
| December 2024 | 28 | 28 | 71.4% | 0 |
| January 2025 | 30 | 30 | 86.7% | 0 |
| February 2025 | 28 | 28 | 64.3% | 0 |
| March 2025 | 31 | 31 | 87.1% | 0 |
| April 2025 | 30 | 30 | 96.7% | 0 |
| May 2025 | 41 | 41 | 70.7% | 0 |
| June 2025 | 39 | 39 | 74.4% | 0 |
| July 2025 | 54 | 53 | 77.4% | 1 |
| August 2025 | 31 | 31 | 77.4% | 0 |
| September 2025 | 29 | 28 | 42.9% | 1 |
| October 2025 | 23 | 22 | 86.4% | 1 |
| November 2025 | 30 | 27 | 77.8% | 3 |
| December 2025 | 36 | 36 | 83.3% | 0 |
| January 2026 | 58 | 55 | 89.1% | 3 |
| February 2026 | 36 | 35 | 91.4% | 1 |
| March 2026 | 31 | 30 | 83.3% | 1 |
| April 2026 | 27 | 27 | 81.5% | 0 |
| May 2026 | 31 | 31 | 100.0% | 0 |
| June 2026 | 36 | 36 | 97.2% | 0 |
| July 2026 | 61 | 60 | 90.0% | 1 |