UA2309
UA2309 (United Airlines) is a multi-stop service on 6 routes, busiest Denver to San Diego. Of 1,007 departures recorded from October 2024 to July 2026, 86.2% left on time, according to the US BTS.
- On-time departures86.2%of 1,007 flights
- Average delay4.0 min
- July 202662▲ 100.0%vs July 2025
- Cancelled0.1%
- Legs flown under this number6
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 | 42 | 57 | ▲ 35.7% |
| February | 44 | 32 | ▼ 27.3% |
| March | 36 | 33 | ▼ 8.3% |
| April | 30 | 62 | ▲ 106.7% |
| May | 31 | 62 | ▲ 100.0% |
| June | 30 | 60 | ▲ 100.0% |
| July | 31 | 62 | ▲ 100.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 244 | 368 | ▲ 50.8% |
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 | 85.7% | 98.3% | ▲ 14.6% |
| February | 95.5% | 84.4% | ▼ 11.6% |
| March | 97.2% | 90.9% | ▼ 6.5% |
| April | 93.3% | 90.3% | ▼ 3.2% |
| May | 90.3% | 77.4% | ▼ 14.3% |
| June | 93.3% | 71.7% | ▼ 23.2% |
| July | 93.6% | 72.6% | ▼ 22.4% |
| August | 80.7% | – | – |
| September | 86.7% | – | – |
| October | 100.0% | – | in progress |
| November | 100.0% | – | – |
| December | 96.8% | – | – |
| Year-to-date average (Jan–Jul) | 92.7% | 83.6% | ▼ 9.8% |
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 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 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 99.9% 1,006
- Cancelled 0.1% 1
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
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DEN SAN Denver International Airport – San Diego International Airport | 1,371 | 0.2 min | 93.2% | 635 |
| SAN SFO San Diego International Airport – San Francisco International Airport | 719 | 10.4 min | 72.0% | 282 |
| SFO PDX San Francisco International Airport – Portland International Airport | 886 | 8.7 min | 80.3% | 66 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 65 | 65 | 87.7% | 0 |
| November 2024 | 89 | 89 | 84.3% | 0 |
| December 2024 | 89 | 89 | 71.9% | 0 |
| January 2025 | 42 | 42 | 85.7% | 0 |
| February 2025 | 44 | 44 | 95.5% | 0 |
| March 2025 | 36 | 36 | 97.2% | 0 |
| April 2025 | 30 | 30 | 93.3% | 0 |
| May 2025 | 31 | 31 | 90.3% | 0 |
| June 2025 | 30 | 30 | 93.3% | 0 |
| July 2025 | 31 | 31 | 93.6% | 0 |
| August 2025 | 31 | 31 | 80.7% | 0 |
| September 2025 | 30 | 30 | 86.7% | 0 |
| October 2025 | 31 | 31 | 100.0% | 0 |
| November 2025 | 29 | 28 | 100.0% | 1 |
| December 2025 | 31 | 31 | 96.8% | 0 |
| January 2026 | 57 | 57 | 98.3% | 0 |
| February 2026 | 32 | 32 | 84.4% | 0 |
| March 2026 | 33 | 33 | 90.9% | 0 |
| April 2026 | 62 | 62 | 90.3% | 0 |
| May 2026 | 62 | 62 | 77.4% | 0 |
| June 2026 | 60 | 60 | 71.7% | 0 |
| July 2026 | 62 | 62 | 72.6% | 0 |