UA581
UA581 (United Airlines) is a multi-stop service on 8 routes, busiest Des Moines to Denver. Of 709 departures recorded from October 2024 to July 2026, 83.6% left on time, according to the US BTS.
- On-time departures83.6%of 709 flights
- Average delay8.9 min
- July 202631▲ 0.0%vs July 2025
- Cancelled1.0%
- Legs flown under this number8
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 | 31 | 31 | 0.0% |
| February | 28 | 28 | 0.0% |
| March | 31 | 31 | 0.0% |
| April | 30 | 31 | ▲ 3.3% |
| May | 31 | 57 | ▲ 83.9% |
| June | 30 | 54 | ▲ 80.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 212 | 263 | ▲ 24.1% |
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 | 90.3% | 90.3% | 0.0% |
| February | 92.9% | 88.9% | ▼ 4.3% |
| March | 93.3% | 60.0% | ▼ 35.7% |
| April | 76.7% | 90.3% | ▲ 17.8% |
| May | 77.4% | 52.6% | ▼ 32.0% |
| June | 69.0% | 88.7% | ▲ 28.6% |
| July | 83.9% | 93.6% | ▲ 11.5% |
| August | 77.4% | – | – |
| September | 96.7% | – | – |
| October | 93.6% | – | in progress |
| November | 96.6% | – | – |
| December | 83.9% | – | – |
| Year-to-date average (Jan–Jul) | 83.3% | 80.6% | ▼ 3.3% |
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 | 0 | 0 | – |
| February | 0 | 1 | – |
| March | 1 | 1 | 0.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 1 | 0.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 3 | ▲ 50.0% |
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 99.0% 702
- Cancelled 1.0% 7
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DSM DEN Des Moines International Airport – Denver International Airport | 947 | 6.3 min | 87.3% | 541 |
| ORD DEN Chicago O'Hare International Airport – Denver International Airport | 1,426 | 6.0 min | 94.6% | 37 |
| BWI ORD Baltimore/Washington International Thurgood Marshall Airport – Chicago O'Hare International Airport | 998 | -1.7 min | 94.1% | 35 |
| ORD DSM Chicago O'Hare International Airport – Des Moines International Airport | 480 | 26.9 min | 75.8% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 30 | 30 | 93.3% | 0 |
| December 2024 | 31 | 30 | 83.3% | 1 |
| January 2025 | 31 | 31 | 90.3% | 0 |
| February 2025 | 28 | 28 | 92.9% | 0 |
| March 2025 | 31 | 30 | 93.3% | 1 |
| April 2025 | 30 | 30 | 76.7% | 0 |
| May 2025 | 31 | 31 | 77.4% | 0 |
| June 2025 | 30 | 29 | 69.0% | 1 |
| July 2025 | 31 | 31 | 83.9% | 0 |
| August 2025 | 31 | 31 | 77.4% | 0 |
| September 2025 | 30 | 30 | 96.7% | 0 |
| October 2025 | 31 | 31 | 93.6% | 0 |
| November 2025 | 30 | 29 | 96.6% | 1 |
| December 2025 | 31 | 31 | 83.9% | 0 |
| January 2026 | 31 | 31 | 90.3% | 0 |
| February 2026 | 28 | 27 | 88.9% | 1 |
| March 2026 | 31 | 30 | 60.0% | 1 |
| April 2026 | 31 | 31 | 90.3% | 0 |
| May 2026 | 57 | 57 | 52.6% | 0 |
| June 2026 | 54 | 53 | 88.7% | 1 |
| July 2026 | 31 | 31 | 93.6% | 0 |