UA531
UA531 (United Airlines) is a multi-stop service on 11 routes, busiest Denver to Los Angeles. Of 994 departures recorded from October 2024 to July 2026, 75.6% left on time, according to the US BTS.
- On-time departures75.6%of 994 flights
- Average delay16.5 min
- July 202661▼ 1.6%vs July 2025
- Cancelled0.3%
- Legs flown under this number11
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 | 54 | 30 | ▼ 44.4% |
| February | 48 | 45 | ▼ 6.3% |
| March | 51 | 57 | ▲ 11.8% |
| April | 30 | 56 | ▲ 86.7% |
| May | 31 | 60 | ▲ 93.5% |
| June | 35 | 36 | ▲ 2.9% |
| July | 62 | 61 | ▼ 1.6% |
| August | 57 | – | – |
| September | 47 | – | – |
| October | 34 | – | in progress |
| November | 47 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 311 | 345 | ▲ 10.9% |
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 | 75.9% | 90.0% | ▲ 18.5% |
| February | 75.0% | 77.8% | ▲ 3.7% |
| March | 84.3% | 79.0% | ▼ 6.4% |
| April | 80.0% | 80.4% | ▲ 0.4% |
| May | 64.5% | 74.6% | ▲ 15.6% |
| June | 65.7% | 69.4% | ▲ 5.7% |
| July | 62.9% | 45.9% | ▼ 27.0% |
| August | 51.8% | – | – |
| September | 85.1% | – | – |
| October | 94.1% | – | in progress |
| November | 89.4% | – | – |
| December | 77.4% | – | – |
| Year-to-date average (Jan–Jul) | 72.6% | 73.9% | ▲ 1.7% |
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 | 1 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 1 |
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 99.7% 991
- Cancelled 0.3% 3
Share of all recorded flights in the period, all legs. · Oct 13, 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 |
|---|---|---|---|---|
| DEN LAX Denver International Airport – Los Angeles International Airport | 1,385 | 12.6 min | 79.8% | 525 |
| MCO DEN Orlando International Airport – Denver International Airport | 2,486 | 18.7 min | 71.6% | 210 |
| JAC DEN Jackson Hole Airport – Denver International Airport | 653 | 31.7 min | 57.1% | 77 |
| MSY DEN Louis Armstrong New Orleans International Airport – Denver International Airport | 1,708 | 3.5 min | 85.4% | 48 |
| TPA DEN Tampa International Airport – Denver International Airport | 2,423 | 19.1 min | 70.3% | 37 |
| IAH DEN George Bush Intercontinental Airport – Denver International Airport | 1,387 | 3.7 min | 94.4% | 36 |
| DEN JAC Denver International Airport – Jackson Hole Airport | 653 | 53.8 min | 47.2% | 36 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 22 | 22 | 81.8% | 0 |
| November 2024 | 58 | 57 | 93.0% | 1 |
| December 2024 | 42 | 42 | 85.7% | 0 |
| January 2025 | 54 | 54 | 75.9% | 0 |
| February 2025 | 48 | 48 | 75.0% | 0 |
| March 2025 | 51 | 51 | 84.3% | 0 |
| April 2025 | 30 | 30 | 80.0% | 0 |
| May 2025 | 31 | 31 | 64.5% | 0 |
| June 2025 | 35 | 35 | 65.7% | 0 |
| July 2025 | 62 | 62 | 62.9% | 0 |
| August 2025 | 57 | 56 | 51.8% | 1 |
| September 2025 | 47 | 47 | 85.1% | 0 |
| October 2025 | 34 | 34 | 94.1% | 0 |
| November 2025 | 47 | 47 | 89.4% | 0 |
| December 2025 | 31 | 31 | 77.4% | 0 |
| January 2026 | 30 | 30 | 90.0% | 0 |
| February 2026 | 45 | 45 | 77.8% | 0 |
| March 2026 | 57 | 57 | 79.0% | 0 |
| April 2026 | 56 | 56 | 80.4% | 0 |
| May 2026 | 60 | 59 | 74.6% | 1 |
| June 2026 | 36 | 36 | 69.4% | 0 |
| July 2026 | 61 | 61 | 45.9% | 0 |