UA1940
UA1940 (United Airlines) is a multi-stop service on 9 routes, busiest Denver to San Diego. Of 757 departures recorded from October 2024 to July 2026, 86.2% left on time, according to the US BTS.
- On-time departures86.2%of 757 flights
- Average delay7.2 min
- July 202631▲ 0.0%vs July 2025
- Cancelled0.8%
- Legs flown under this number9
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 | 28 | 31 | ▲ 10.7% |
| February | 24 | 45 | ▲ 87.5% |
| March | 26 | 59 | ▲ 126.9% |
| April | 30 | 31 | ▲ 3.3% |
| May | 31 | 42 | ▲ 35.5% |
| June | 30 | 54 | ▲ 80.0% |
| July | 31 | 31 | 0.0% |
| August | 45 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 47 | – | – |
| Year to date (Jan–Jul) | 200 | 293 | ▲ 46.5% |
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% | 87.1% | ▼ 9.4% |
| February | 83.3% | 83.7% | ▲ 0.5% |
| March | 76.0% | 86.4% | ▲ 13.7% |
| April | 90.0% | 87.1% | ▼ 3.2% |
| May | 90.3% | 85.7% | ▼ 5.1% |
| June | 93.3% | 77.8% | ▼ 16.7% |
| July | 87.1% | 77.4% | ▼ 11.1% |
| August | 93.3% | – | – |
| September | 83.3% | – | – |
| October | 87.1% | – | in progress |
| November | 80.0% | – | – |
| December | 83.0% | – | – |
| Year-to-date average (Jan–Jul) | 88.0% | 83.6% | ▼ 5.0% |
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 | 2 | 0 | ▼ 100.0% |
| February | 0 | 2 | – |
| March | 1 | 0 | ▼ 100.0% |
| April | 0 | 0 | – |
| 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) | 3 | 2 | ▼ 33.3% |
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 99.2% 751
- Cancelled 0.8% 6
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 |
|---|---|---|---|---|
| DEN SAN Denver International Airport – San Diego International Airport | 1,371 | 6.6 min | 83.9% | 347 |
| IAD ATL Washington Dulles International Airport – Hartsfield Jackson Atlanta International Airport | 859 | 4.5 min | 89.2% | 245 |
| IAD SFO Washington Dulles International Airport – San Francisco International Airport | 3,883 | 5.7 min | 90.7% | 54 |
| XNA DEN Northwest Arkansas National Airport – Denver International Airport | 990 | 28.1 min | 80.0% | 35 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 100.0% | 0 |
| November 2024 | 30 | 29 | 93.1% | 1 |
| December 2024 | 31 | 31 | 83.9% | 0 |
| January 2025 | 28 | 26 | 96.2% | 2 |
| February 2025 | 24 | 24 | 83.3% | 0 |
| March 2025 | 26 | 25 | 76.0% | 1 |
| April 2025 | 30 | 30 | 90.0% | 0 |
| May 2025 | 31 | 31 | 90.3% | 0 |
| June 2025 | 30 | 30 | 93.3% | 0 |
| July 2025 | 31 | 31 | 87.1% | 0 |
| August 2025 | 45 | 45 | 93.3% | 0 |
| September 2025 | 30 | 30 | 83.3% | 0 |
| October 2025 | 31 | 31 | 87.1% | 0 |
| November 2025 | 30 | 30 | 80.0% | 0 |
| December 2025 | 47 | 47 | 83.0% | 0 |
| January 2026 | 31 | 31 | 87.1% | 0 |
| February 2026 | 45 | 43 | 83.7% | 2 |
| March 2026 | 59 | 59 | 86.4% | 0 |
| April 2026 | 31 | 31 | 87.1% | 0 |
| May 2026 | 42 | 42 | 85.7% | 0 |
| June 2026 | 54 | 54 | 77.8% | 0 |
| July 2026 | 31 | 31 | 77.4% | 0 |