UA1843
UA1843 (United Airlines) is a multi-stop service on 9 routes, busiest Los Angeles to Chicago. Of 797 departures recorded from October 2024 to July 2026, 78.3% left on time, according to the US BTS.
- On-time departures78.3%of 797 flights
- Average delay12.1 min
- July 202660▲ 93.5%vs July 2025
- Cancelled0.6%
- Legs flown under this number9
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 | 19 | 23 | ▲ 21.1% |
| February | 38 | 25 | ▼ 34.2% |
| March | 60 | 19 | ▼ 68.3% |
| April | 30 | 60 | ▲ 100.0% |
| May | 31 | 62 | ▲ 100.0% |
| June | 30 | 60 | ▲ 100.0% |
| July | 31 | 60 | ▲ 93.5% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 31 | – | – |
| December | 32 | – | – |
| Year to date (Jan–Jul) | 239 | 309 | ▲ 29.3% |
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 | 79.0% | 78.3% | ▼ 0.9% |
| February | 92.1% | 84.0% | ▼ 8.8% |
| March | 86.4% | 84.2% | ▼ 2.6% |
| April | 83.3% | 85.0% | ▲ 2.0% |
| May | 77.4% | 63.9% | ▼ 17.4% |
| June | 66.7% | 76.7% | ▲ 15.0% |
| July | 65.5% | 71.7% | ▲ 9.4% |
| August | 64.5% | – | – |
| September | 96.7% | – | – |
| October | 87.1% | – | in progress |
| November | 93.6% | – | – |
| December | 59.4% | – | – |
| Year-to-date average (Jan–Jul) | 78.6% | 77.7% | ▼ 1.2% |
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 | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 1 | 0 | ▼ 100.0% |
| April | 0 | 0 | – |
| May | 0 | 1 | – |
| June | 0 | 0 | – |
| July | 2 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 3 | 1 | ▼ 66.7% |
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 99.4% 792
- Cancelled 0.6% 5
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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| LAX ORD Los Angeles International Airport – Chicago O'Hare International Airport | 2,802 | 11.6 min | 77.8% | 300 |
| DEN CMH Denver International Airport – John Glenn Columbus International Airport | 1,853 | 15.4 min | 81.4% | 145 |
| PSP DEN Palm Springs International Airport – Denver International Airport | 1,247 | 19.3 min | 68.3% | 124 |
| LAX IAD Los Angeles International Airport – Washington Dulles International Airport | 3,674 | 10.0 min | 78.3% | 84 |
| SFO LAX San Francisco International Airport – Los Angeles International Airport | 543 | 3.8 min | 84.6% | 78 |
| MIA IAH Miami International Airport – George Bush Intercontinental Airport | 1,549 | 2.0 min | 89.2% | 37 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 30 | 29 | 75.9% | 1 |
| December 2024 | 44 | 44 | 72.7% | 0 |
| January 2025 | 19 | 19 | 79.0% | 0 |
| February 2025 | 38 | 38 | 92.1% | 0 |
| March 2025 | 60 | 59 | 86.4% | 1 |
| April 2025 | 30 | 30 | 83.3% | 0 |
| May 2025 | 31 | 31 | 77.4% | 0 |
| June 2025 | 30 | 30 | 66.7% | 0 |
| July 2025 | 31 | 29 | 65.5% | 2 |
| August 2025 | 31 | 31 | 64.5% | 0 |
| September 2025 | 30 | 30 | 96.7% | 0 |
| October 2025 | 31 | 31 | 87.1% | 0 |
| November 2025 | 31 | 31 | 93.6% | 0 |
| December 2025 | 32 | 32 | 59.4% | 0 |
| January 2026 | 23 | 23 | 78.3% | 0 |
| February 2026 | 25 | 25 | 84.0% | 0 |
| March 2026 | 19 | 19 | 84.2% | 0 |
| April 2026 | 60 | 60 | 85.0% | 0 |
| May 2026 | 62 | 61 | 63.9% | 1 |
| June 2026 | 60 | 60 | 76.7% | 0 |
| July 2026 | 60 | 60 | 71.7% | 0 |