UA557
UA557 (United Airlines) is a multi-stop service on 4 routes, busiest Charleston to Denver. Of 690 departures recorded from October 2024 to July 2026, 76.6% left on time, according to the US BTS.
- On-time departures76.6%of 690 flights
- Average delay19.0 min
- July 202631▲ 0.0%vs July 2025
- Cancelled1.0%
- Legs flown under this number4
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 | 35 | ▲ 12.9% |
| February | 28 | 28 | 0.0% |
| March | 31 | 55 | ▲ 77.4% |
| April | 30 | 29 | ▼ 3.3% |
| May | 31 | 28 | ▼ 9.7% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 41 | – | – |
| Year to date (Jan–Jul) | 212 | 236 | ▲ 11.3% |
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 | 67.9% | 94.1% | ▲ 38.7% |
| February | 89.3% | 85.7% | ▼ 4.0% |
| March | 77.4% | 69.1% | ▼ 10.8% |
| April | 70.0% | 62.1% | ▼ 11.3% |
| May | 58.1% | 71.4% | ▲ 23.0% |
| June | 58.6% | 83.3% | ▲ 42.2% |
| July | 71.0% | 86.7% | ▲ 22.1% |
| August | 64.5% | – | – |
| September | 90.0% | – | – |
| October | 67.7% | – | in progress |
| November | 89.3% | – | – |
| December | 78.1% | – | – |
| Year-to-date average (Jan–Jul) | 70.3% | 78.9% | ▲ 12.2% |
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 | 3 | 1 | ▼ 66.7% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 2 | ▼ 50.0% |
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 99.0% 683
- Cancelled 1.0% 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 |
|---|---|---|---|---|
| CHS DEN Charleston International Airport – Denver International Airport | 2,328 | 19.5 min | 76.2% | 615 |
| BIL DEN Billings Logan International Airport – Denver International Airport | 733 | 11.2 min | 88.9% | 37 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 29 | 29 | 75.9% | 0 |
| December 2024 | 31 | 31 | 93.6% | 0 |
| January 2025 | 31 | 28 | 67.9% | 3 |
| February 2025 | 28 | 28 | 89.3% | 0 |
| March 2025 | 31 | 31 | 77.4% | 0 |
| April 2025 | 30 | 30 | 70.0% | 0 |
| May 2025 | 31 | 31 | 58.1% | 0 |
| June 2025 | 30 | 29 | 58.6% | 1 |
| July 2025 | 31 | 31 | 71.0% | 0 |
| August 2025 | 31 | 31 | 64.5% | 0 |
| September 2025 | 30 | 30 | 90.0% | 0 |
| October 2025 | 31 | 31 | 67.7% | 0 |
| November 2025 | 29 | 28 | 89.3% | 1 |
| December 2025 | 41 | 41 | 78.1% | 0 |
| January 2026 | 35 | 34 | 94.1% | 1 |
| February 2026 | 28 | 28 | 85.7% | 0 |
| March 2026 | 55 | 55 | 69.1% | 0 |
| April 2026 | 29 | 29 | 62.1% | 0 |
| May 2026 | 28 | 28 | 71.4% | 0 |
| June 2026 | 30 | 30 | 83.3% | 0 |
| July 2026 | 31 | 30 | 86.7% | 1 |