UA1139
UA1139 (United Airlines) is a multi-stop service on 19 routes, busiest Chicago to Des Moines. Of 690 departures recorded from October 2024 to July 2026, 88.2% left on time, according to the US BTS.
- On-time departures88.2%of 690 flights
- Average delay4.4 min
- July 202619▲ 5.6%vs July 2025
- Cancelled0.6%
- Legs flown under this number19
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 | 37 | 31 | ▼ 16.2% |
| February | 44 | 42 | ▼ 4.5% |
| March | 62 | 34 | ▼ 45.2% |
| April | 60 | 21 | ▼ 65.0% |
| May | 23 | 31 | ▲ 34.8% |
| June | 28 | 30 | ▲ 7.1% |
| July | 18 | 19 | ▲ 5.6% |
| August | 23 | – | – |
| September | 30 | – | – |
| October | 30 | – | in progress |
| November | 21 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 272 | 208 | ▼ 23.5% |
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 | 86.5% | 96.8% | ▲ 11.9% |
| February | 84.1% | 90.5% | ▲ 7.6% |
| March | 79.0% | 82.4% | ▲ 4.2% |
| April | 96.7% | 85.7% | ▼ 11.3% |
| May | 87.0% | 93.6% | ▲ 7.6% |
| June | 75.0% | 100.0% | ▲ 33.3% |
| July | 94.1% | 89.5% | ▼ 4.9% |
| August | 82.6% | – | – |
| September | 86.7% | – | – |
| October | 90.0% | – | in progress |
| November | 89.5% | – | – |
| December | 83.9% | – | – |
| Year-to-date average (Jan–Jul) | 86.1% | 91.2% | ▲ 6.0% |
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 | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 0 | ▼ 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 99.4% 686
- Cancelled 0.6% 4
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 DSM Chicago O'Hare International Airport – Des Moines International Airport | 480 | 5.2 min | 86.5% | 166 |
| ORD DJT Chicago O'Hare International Airport – President Donald J. Trump International Airport | 1,844 | 7.0 min | 80.7% | 114 |
| DEN IDA Denver International Airport – Idaho Falls Regional Airport | 736 | 6.7 min | 83.6% | 67 |
| EWR LAS Newark Liberty International Airport – Harry Reid International Airport | 3,576 | -1.5 min | 95.0% | 60 |
| LGA ORD LaGuardia Airport – Chicago O'Hare International Airport | 1,177 | -4.3 min | 96.2% | 53 |
| JAX ORD Jacksonville International Airport – Chicago O'Hare International Airport | 1,393 | 6.7 min | 92.9% | 43 |
| IND SFO Indianapolis International Airport – San Francisco International Airport | 3,120 | 0.4 min | 94.6% | 37 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 21 | 21 | 90.5% | 0 |
| December 2024 | 34 | 33 | 87.9% | 1 |
| January 2025 | 37 | 37 | 86.5% | 0 |
| February 2025 | 44 | 44 | 84.1% | 0 |
| March 2025 | 62 | 62 | 79.0% | 0 |
| April 2025 | 60 | 60 | 96.7% | 0 |
| May 2025 | 23 | 23 | 87.0% | 0 |
| June 2025 | 28 | 28 | 75.0% | 0 |
| July 2025 | 18 | 17 | 94.1% | 1 |
| August 2025 | 23 | 23 | 82.6% | 0 |
| September 2025 | 30 | 30 | 86.7% | 0 |
| October 2025 | 30 | 30 | 90.0% | 0 |
| November 2025 | 21 | 19 | 89.5% | 2 |
| December 2025 | 31 | 31 | 83.9% | 0 |
| January 2026 | 31 | 31 | 96.8% | 0 |
| February 2026 | 42 | 42 | 90.5% | 0 |
| March 2026 | 34 | 34 | 82.4% | 0 |
| April 2026 | 21 | 21 | 85.7% | 0 |
| May 2026 | 31 | 31 | 93.6% | 0 |
| June 2026 | 30 | 30 | 100.0% | 0 |
| July 2026 | 19 | 19 | 89.5% | 0 |