UA1537
UA1537 (United Airlines) is a multi-stop service on 12 routes, busiest Denver to Jackson. Of 809 departures recorded from October 2024 to July 2026, 87.8% left on time, according to the US BTS.
- On-time departures87.8%of 809 flights
- Average delay4.9 min
- July 202662▲ 0.0%vs July 2025
- Cancelled0.4%
- Legs flown under this number12
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 | 26 | 57 | ▲ 119.2% |
| February | 24 | 56 | ▲ 133.3% |
| March | 30 | 31 | ▲ 3.3% |
| April | 30 | 30 | 0.0% |
| May | 31 | 40 | ▲ 29.0% |
| June | 34 | 52 | ▲ 52.9% |
| July | 62 | 62 | 0.0% |
| August | 44 | – | – |
| September | 54 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 237 | 328 | ▲ 38.4% |
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 | 96.2% | 87.5% | ▼ 9.0% |
| February | 95.8% | 82.1% | ▼ 14.3% |
| March | 96.7% | 83.9% | ▼ 13.2% |
| April | 86.7% | 78.6% | ▼ 9.3% |
| May | 90.3% | 87.5% | ▼ 3.1% |
| June | 79.4% | 84.6% | ▲ 6.6% |
| July | 85.5% | 77.4% | ▼ 9.4% |
| August | 88.6% | – | – |
| September | 92.6% | – | – |
| October | 100.0% | – | in progress |
| November | 93.3% | – | – |
| December | 89.7% | – | – |
| Year-to-date average (Jan–Jul) | 90.1% | 83.1% | ▼ 7.8% |
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 | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 2 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 3 |
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 99.6% 806
- Cancelled 0.4% 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
8| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DEN JAC Denver International Airport – Jackson Hole Airport | 653 | 6.0 min | 86.1% | 310 |
| IAD DEN Washington Dulles International Airport – Denver International Airport | 2,332 | 8.8 min | 87.9% | 141 |
| DEN SLC Denver International Airport – Salt Lake City International Airport | 628 | -1.9 min | 96.0% | 99 |
| PHL DEN Philadelphia International Airport – Denver International Airport | 2,501 | 10.4 min | 80.7% | 62 |
| XNA DEN Northwest Arkansas National Airport – Denver International Airport | 990 | -0.1 min | 88.9% | 37 |
| SJC DEN Mineta San Jose International Airport – Denver International Airport | 1,522 | 0.7 min | 91.9% | 37 |
| PIT DEN Pittsburgh International Airport – Denver International Airport | 2,071 | -2.1 min | 91.4% | 35 |
| ORD RSW Chicago O'Hare International Airport – Southwest Florida International Airport | 1,807 | 6.1 min | 76.7% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 11 | 11 | 90.9% | 0 |
| November 2024 | 17 | 17 | 100.0% | 0 |
| December 2024 | 28 | 28 | 92.9% | 0 |
| January 2025 | 26 | 26 | 96.2% | 0 |
| February 2025 | 24 | 24 | 95.8% | 0 |
| March 2025 | 30 | 30 | 96.7% | 0 |
| April 2025 | 30 | 30 | 86.7% | 0 |
| May 2025 | 31 | 31 | 90.3% | 0 |
| June 2025 | 34 | 34 | 79.4% | 0 |
| July 2025 | 62 | 62 | 85.5% | 0 |
| August 2025 | 44 | 44 | 88.6% | 0 |
| September 2025 | 54 | 54 | 92.6% | 0 |
| October 2025 | 31 | 31 | 100.0% | 0 |
| November 2025 | 30 | 30 | 93.3% | 0 |
| December 2025 | 29 | 29 | 89.7% | 0 |
| January 2026 | 57 | 56 | 87.5% | 1 |
| February 2026 | 56 | 56 | 82.1% | 0 |
| March 2026 | 31 | 31 | 83.9% | 0 |
| April 2026 | 30 | 28 | 78.6% | 2 |
| May 2026 | 40 | 40 | 87.5% | 0 |
| June 2026 | 52 | 52 | 84.6% | 0 |
| July 2026 | 62 | 62 | 77.4% | 0 |