UA1339
UA1339 (United Airlines) is a multi-stop service on 2 routes, busiest Denver to San Juan. Of 1,179 departures recorded from October 2024 to July 2026, 90.9% left on time, according to the US BTS.
- On-time departures90.9%of 1,179 flights
- Average delay3.5 min
- July 202631▼ 50.0%vs July 2025
- Cancelled0.3%
- Legs flown under this number2
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 | 62 | 62 | 0.0% |
| February | 56 | 55 | ▼ 1.8% |
| March | 62 | 62 | 0.0% |
| April | 60 | 60 | 0.0% |
| May | 62 | 31 | ▼ 50.0% |
| June | 60 | 30 | ▼ 50.0% |
| July | 62 | 31 | ▼ 50.0% |
| August | 51 | – | – |
| September | 39 | – | – |
| October | 62 | – | in progress |
| November | 60 | – | – |
| December | 62 | – | – |
| Year to date (Jan–Jul) | 424 | 331 | ▼ 21.9% |
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 | 90.3% | 93.4% | ▲ 3.5% |
| February | 92.9% | 85.5% | ▼ 8.0% |
| March | 88.7% | 87.1% | ▼ 1.8% |
| April | 98.3% | 93.3% | ▼ 5.1% |
| May | 82.3% | 96.8% | ▲ 17.6% |
| June | 85.0% | 93.3% | ▲ 9.8% |
| July | 82.0% | 90.3% | ▲ 10.2% |
| August | 86.0% | – | – |
| September | 97.4% | – | – |
| October | 96.8% | – | in progress |
| November | 98.3% | – | – |
| December | 88.7% | – | – |
| Year-to-date average (Jan–Jul) | 88.5% | 91.4% | ▲ 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 | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 1 | 0.0% |
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 99.7% 1,175
- Cancelled 0.3% 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
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DEN SJU Denver International Airport – Luis Munoz Marin International Airport | 4,396 | 9.3 min | 85.5% | 614 |
| LAX DEN Los Angeles International Airport – Denver International Airport | 1,385 | -2.8 min | 96.8% | 565 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 28 | 28 | 100.0% | 0 |
| November 2024 | 60 | 59 | 94.9% | 1 |
| December 2024 | 62 | 62 | 88.7% | 0 |
| January 2025 | 62 | 62 | 90.3% | 0 |
| February 2025 | 56 | 56 | 92.9% | 0 |
| March 2025 | 62 | 62 | 88.7% | 0 |
| April 2025 | 60 | 60 | 98.3% | 0 |
| May 2025 | 62 | 62 | 82.3% | 0 |
| June 2025 | 60 | 60 | 85.0% | 0 |
| July 2025 | 62 | 61 | 82.0% | 1 |
| August 2025 | 51 | 50 | 86.0% | 1 |
| September 2025 | 39 | 39 | 97.4% | 0 |
| October 2025 | 62 | 62 | 96.8% | 0 |
| November 2025 | 60 | 60 | 98.3% | 0 |
| December 2025 | 62 | 62 | 88.7% | 0 |
| January 2026 | 62 | 61 | 93.4% | 1 |
| February 2026 | 55 | 55 | 85.5% | 0 |
| March 2026 | 62 | 62 | 87.1% | 0 |
| April 2026 | 60 | 60 | 93.3% | 0 |
| May 2026 | 31 | 31 | 96.8% | 0 |
| June 2026 | 30 | 30 | 93.3% | 0 |
| July 2026 | 31 | 31 | 90.3% | 0 |