UA556
UA556 (United Airlines) is a multi-stop service on 13 routes, busiest Chicago to Charlotte. Of 658 departures recorded from October 2024 to July 2026, 88.8% left on time, according to the US BTS.
- On-time departures88.8%of 658 flights
- Average delay4.2 min
- July 202631▲ 0.0%vs July 2025
- Cancelled1.2%
- Legs flown under this number13
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 | 30 | 31 | ▲ 3.3% |
| February | 24 | 28 | ▲ 16.7% |
| March | 29 | 31 | ▲ 6.9% |
| April | 30 | 27 | ▼ 10.0% |
| May | 31 | 26 | ▼ 16.1% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 29 | – | – |
| September | 26 | – | – |
| October | 27 | – | in progress |
| November | 30 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 205 | 204 | ▼ 0.5% |
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 | 89.3% | 73.3% | ▼ 17.9% |
| February | 87.5% | 92.3% | ▲ 5.5% |
| March | 93.1% | 77.4% | ▼ 16.8% |
| April | 90.0% | 81.5% | ▼ 9.5% |
| May | 93.6% | 92.3% | ▼ 1.3% |
| June | 90.0% | 90.0% | 0.0% |
| July | 96.8% | 80.0% | ▼ 17.3% |
| August | 92.9% | – | – |
| September | 88.5% | – | – |
| October | 96.3% | – | in progress |
| November | 96.7% | – | – |
| December | 87.1% | – | – |
| Year-to-date average (Jan–Jul) | 91.5% | 83.8% | ▼ 8.3% |
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 | 2 | 1 | ▼ 50.0% |
| February | 0 | 2 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 4 | ▲ 100.0% |
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 98.8% 650
- Cancelled 1.2% 8
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
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD CLT Chicago O'Hare International Airport – Charlotte Douglas International Airport | 965 | 0.5 min | 92.8% | 224 |
| SAN IAH San Diego International Airport – George Bush Intercontinental Airport | 2,093 | 0.7 min | 91.8% | 100 |
| EWR IAH Newark Liberty International Airport – George Bush Intercontinental Airport | 2,250 | 9.2 min | 84.5% | 72 |
| ATL EWR Hartsfield Jackson Atlanta International Airport – Newark Liberty International Airport | 1,199 | 9.4 min | 85.7% | 72 |
| BZN LAX Bozeman Yellowstone International Airport – Los Angeles International Airport | 1,453 | -3.3 min | 96.2% | 53 |
| ORD LGA Chicago O'Hare International Airport – LaGuardia Airport | 1,177 | 8.9 min | 83.3% | 37 |
| IAH ORD George Bush Intercontinental Airport – Chicago O'Hare International Airport | 1,491 | 3.3 min | 81.8% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 25 | 25 | 92.0% | 0 |
| November 2024 | 55 | 55 | 87.3% | 0 |
| December 2024 | 26 | 25 | 88.0% | 1 |
| January 2025 | 30 | 28 | 89.3% | 2 |
| February 2025 | 24 | 24 | 87.5% | 0 |
| March 2025 | 29 | 29 | 93.1% | 0 |
| April 2025 | 30 | 30 | 90.0% | 0 |
| May 2025 | 31 | 31 | 93.6% | 0 |
| June 2025 | 30 | 30 | 90.0% | 0 |
| July 2025 | 31 | 31 | 96.8% | 0 |
| August 2025 | 29 | 28 | 92.9% | 1 |
| September 2025 | 26 | 26 | 88.5% | 0 |
| October 2025 | 27 | 27 | 96.3% | 0 |
| November 2025 | 30 | 30 | 96.7% | 0 |
| December 2025 | 31 | 31 | 87.1% | 0 |
| January 2026 | 31 | 30 | 73.3% | 1 |
| February 2026 | 28 | 26 | 92.3% | 2 |
| March 2026 | 31 | 31 | 77.4% | 0 |
| April 2026 | 27 | 27 | 81.5% | 0 |
| May 2026 | 26 | 26 | 92.3% | 0 |
| June 2026 | 30 | 30 | 90.0% | 0 |
| July 2026 | 31 | 30 | 80.0% | 1 |