UA1555
UA1555 (United Airlines) is a multi-stop service on 11 routes, busiest Washington to Chicago. Of 305 departures recorded from October 2024 to February 2026, 77.9% left on time, according to the US BTS.
- On-time departures77.9%of 305 flights
- Average delay14.9 min
- February 20268▼ 63.6%vs February 2025
- Cancelled0.7%
- Legs flown under this number11
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods9 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 46 | 19 | ▼ 58.7% |
| February | 22 | 8 | ▼ 63.6% |
| March | – | – | – |
| April | – | – | – |
| May | – | – | – |
| June | – | – | – |
| July | – | – | – |
| August | 13 | – | – |
| September | 24 | – | – |
| October | 12 | – | in progress |
| November | 60 | – | – |
| December | 18 | – | – |
| Year to date (Jan–Feb) | 68 | 27 | ▼ 60.3% |
according to the US BTS · October 2024 → February 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods9 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 97.8% | 68.4% | ▼ 30.1% |
| February | 81.8% | 62.5% | ▼ 23.6% |
| March | – | – | – |
| April | – | – | – |
| May | – | – | – |
| June | – | – | – |
| July | – | – | – |
| August | 53.9% | – | – |
| September | 56.5% | – | – |
| October | 50.0% | – | in progress |
| November | 61.0% | – | – |
| December | 66.7% | – | – |
| Year-to-date average (Jan–Feb) | 89.8% | 65.5% | ▼ 27.1% |
according to the US BTS · October 2024 → February 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → February 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods9 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | – | – | – |
| April | – | – | – |
| May | – | – | – |
| June | – | – | – |
| July | – | – | – |
| August | 0 | – | – |
| September | 1 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Feb) | 0 | 0 |
according to the US BTS · October 2024 → February 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 99.3% 303
- Cancelled 0.7% 2
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Feb 11, 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 |
|---|---|---|---|---|
| DCA ORD Ronald Reagan Washington National Airport – Chicago O'Hare International Airport | 983 | 10.8 min | 70.6% | 52 |
| ORD DEN Chicago O'Hare International Airport – Denver International Airport | 1,426 | 31.2 min | 62.8% | 51 |
| SFO EWR San Francisco International Airport – Newark Liberty International Airport | 4,118 | 0.4 min | 94.6% | 37 |
| ORD BWI Chicago O'Hare International Airport – Baltimore/Washington International Thurgood Marshall Airport | 998 | -0.4 min | 94.6% | 37 |
| LAX SFO Los Angeles International Airport – San Francisco International Airport | 543 | 4.1 min | 90.3% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 35 | 35 | 97.1% | 0 |
| November 2024 | 30 | 30 | 96.7% | 0 |
| December 2024 | 18 | 18 | 100.0% | 0 |
| January 2025 | 46 | 46 | 97.8% | 0 |
| February 2025 | 22 | 22 | 81.8% | 0 |
| August 2025 | 13 | 13 | 53.9% | 0 |
| September 2025 | 24 | 23 | 56.5% | 1 |
| October 2025 | 12 | 12 | 50.0% | 0 |
| November 2025 | 60 | 59 | 61.0% | 1 |
| December 2025 | 18 | 18 | 66.7% | 0 |
| January 2026 | 19 | 19 | 68.4% | 0 |
| February 2026 | 8 | 8 | 62.5% | 0 |