UA1583
UA1583 (United Airlines) is a multi-stop service on 10 routes, busiest Chicago to Baltimore. Of 1,093 departures recorded from October 2024 to July 2026, 77.7% left on time, according to the US BTS.
- On-time departures77.7%of 1,093 flights
- Average delay17.0 min
- July 202662▲ 106.7%vs July 2025
- Cancelled0.8%
- Legs flown under this number10
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 | 31 | 88 | ▲ 183.9% |
| February | 44 | 60 | ▲ 36.4% |
| March | 62 | 59 | ▼ 4.8% |
| April | 60 | 59 | ▼ 1.7% |
| May | 31 | 61 | ▲ 96.8% |
| June | 30 | 60 | ▲ 100.0% |
| July | 30 | 62 | ▲ 106.7% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 37 | – | in progress |
| November | 59 | – | – |
| December | 46 | – | – |
| Year to date (Jan–Jul) | 288 | 449 | ▲ 55.9% |
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 | 69.0% | 77.9% | ▲ 13.0% |
| February | 86.4% | 86.7% | ▲ 0.4% |
| March | 79.0% | 69.5% | ▼ 12.1% |
| April | 76.3% | 79.3% | ▲ 4.0% |
| May | 87.1% | 82.0% | ▼ 5.9% |
| June | 53.3% | 75.0% | ▲ 40.6% |
| July | 44.8% | 78.7% | ▲ 75.5% |
| August | 60.0% | – | – |
| September | 90.0% | – | – |
| October | 83.8% | – | in progress |
| November | 76.3% | – | – |
| December | 89.1% | – | – |
| Year-to-date average (Jan–Jul) | 70.8% | 78.4% | ▲ 10.7% |
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 | 2 | 2 | 0.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 1 | 1 | 0.0% |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 1 | 0.0% |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 4 | 0.0% |
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 99.2% 1,084
- Cancelled 0.8% 9
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
99 of 9
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD BWI Chicago O'Hare International Airport – Baltimore/Washington International Thurgood Marshall Airport | 998 | 20.5 min | 71.2% | 377 |
| LAS ORD Harry Reid International Airport – Chicago O'Hare International Airport | 2,432 | 7.7 min | 89.6% | 279 |
| ORD RIC Chicago O'Hare International Airport – Richmond International Airport | 1,032 | 33.4 min | 70.1% | 128 |
| TPA ORD Tampa International Airport – Chicago O'Hare International Airport | 1,631 | 8.7 min | 87.0% | 77 |
| ORD MDT Chicago O'Hare International Airport – Harrisburg International Airport | 954 | 33.1 min | 61.5% | 66 |
| SFO LAS San Francisco International Airport – Harry Reid International Airport | 665 | 5.8 min | 94.6% | 37 |
| ORD TYS Chicago O'Hare International Airport – McGhee Tyson Airport | 765 | 22.1 min | 60.0% | 37 |
| LAX DEN Los Angeles International Airport – Denver International Airport | 1,385 | 4.3 min | 86.5% | 37 |
| DEN ORD Denver International Airport – Chicago O'Hare International Airport | 1,426 | 3.1 min | 86.1% | 36 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 30 | 30 | 90.0% | 0 |
| November 2024 | 88 | 88 | 79.6% | 0 |
| December 2024 | 35 | 35 | 74.3% | 0 |
| January 2025 | 31 | 29 | 69.0% | 2 |
| February 2025 | 44 | 44 | 86.4% | 0 |
| March 2025 | 62 | 62 | 79.0% | 0 |
| April 2025 | 60 | 59 | 76.3% | 1 |
| May 2025 | 31 | 31 | 87.1% | 0 |
| June 2025 | 30 | 30 | 53.3% | 0 |
| July 2025 | 30 | 29 | 44.8% | 1 |
| August 2025 | 31 | 30 | 60.0% | 1 |
| September 2025 | 30 | 30 | 90.0% | 0 |
| October 2025 | 37 | 37 | 83.8% | 0 |
| November 2025 | 59 | 59 | 76.3% | 0 |
| December 2025 | 46 | 46 | 89.1% | 0 |
| January 2026 | 88 | 86 | 77.9% | 2 |
| February 2026 | 60 | 60 | 86.7% | 0 |
| March 2026 | 59 | 59 | 69.5% | 0 |
| April 2026 | 59 | 58 | 79.3% | 1 |
| May 2026 | 61 | 61 | 82.0% | 0 |
| June 2026 | 60 | 60 | 75.0% | 0 |
| July 2026 | 62 | 61 | 78.7% | 1 |