UA1666
UA1666 (United Airlines) is a multi-stop service on 7 routes, busiest Cincinnati to Denver. Of 687 departures recorded from October 2024 to July 2026, 89.7% left on time, according to the US BTS.
- On-time departures89.7%of 687 flights
- Average delay5.1 min
- July 202631▲ 0.0%vs July 2025
- Cancelled0.7%
- Legs flown under this number7
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 | 31 | 31 | 0.0% |
| February | 28 | 28 | 0.0% |
| March | 31 | 31 | 0.0% |
| April | 26 | 30 | ▲ 15.4% |
| May | 31 | 31 | 0.0% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 37 | – | in progress |
| November | 56 | – | – |
| December | 32 | – | – |
| Year to date (Jan–Jul) | 208 | 212 | ▲ 1.9% |
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 | 93.3% | 90.0% | ▼ 3.6% |
| February | 89.3% | 92.9% | ▲ 4.0% |
| March | 77.4% | 80.7% | ▲ 4.2% |
| April | 96.0% | 96.6% | ▲ 0.6% |
| May | 93.6% | 86.7% | ▼ 7.4% |
| June | 90.0% | 93.3% | ▲ 3.7% |
| July | 93.6% | 90.3% | ▼ 3.5% |
| August | 87.1% | – | – |
| September | 86.7% | – | – |
| October | 91.9% | – | in progress |
| November | 91.1% | – | – |
| December | 81.3% | – | – |
| Year-to-date average (Jan–Jul) | 90.4% | 90.1% | ▼ 0.4% |
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 | 1 | 1 | 0.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 1 | 1 | 0.0% |
| May | 0 | 1 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 3 | ▲ 50.0% |
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 99.3% 682
- Cancelled 0.7% 5
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 |
|---|---|---|---|---|
| CVG DEN Cincinnati Northern Kentucky International Airport – Denver International Airport | 1,716 | 5.7 min | 89.9% | 456 |
| JAX EWR Jacksonville International Airport – Newark Liberty International Airport | 1,321 | 2.7 min | 91.7% | 133 |
| DEN CLT Denver International Airport – Charlotte Douglas International Airport | 2,148 | 8.6 min | 87.9% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 85.0% | 0 |
| November 2024 | 30 | 30 | 93.3% | 0 |
| December 2024 | 31 | 31 | 93.6% | 0 |
| January 2025 | 31 | 30 | 93.3% | 1 |
| February 2025 | 28 | 28 | 89.3% | 0 |
| March 2025 | 31 | 31 | 77.4% | 0 |
| April 2025 | 26 | 25 | 96.0% | 1 |
| May 2025 | 31 | 31 | 93.6% | 0 |
| June 2025 | 30 | 30 | 90.0% | 0 |
| July 2025 | 31 | 31 | 93.6% | 0 |
| August 2025 | 31 | 31 | 87.1% | 0 |
| September 2025 | 30 | 30 | 86.7% | 0 |
| October 2025 | 37 | 37 | 91.9% | 0 |
| November 2025 | 56 | 56 | 91.1% | 0 |
| December 2025 | 32 | 32 | 81.3% | 0 |
| January 2026 | 31 | 30 | 90.0% | 1 |
| February 2026 | 28 | 28 | 92.9% | 0 |
| March 2026 | 31 | 31 | 80.7% | 0 |
| April 2026 | 30 | 29 | 96.6% | 1 |
| May 2026 | 31 | 30 | 86.7% | 1 |
| June 2026 | 30 | 30 | 93.3% | 0 |
| July 2026 | 31 | 31 | 90.3% | 0 |