UA1840
UA1840 (United Airlines) is a multi-stop service on 18 routes, busiest Denver to Salt Lake City. Of 710 departures recorded from October 2024 to July 2026, 87.3% left on time, according to the US BTS.
- On-time departures87.3%of 710 flights
- Average delay6.8 min
- July 202630▼ 3.2%vs July 2025
- Cancelled0.4%
- Legs flown under this number18
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 37 | 31 | ▼ 16.2% |
| February | 24 | 28 | ▲ 16.7% |
| March | 29 | 34 | ▲ 17.2% |
| April | 29 | 59 | ▲ 103.4% |
| May | 31 | 31 | 0.0% |
| June | 30 | 30 | 0.0% |
| July | 31 | 30 | ▼ 3.2% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 211 | 243 | ▲ 15.2% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 91.9% | 93.3% | ▲ 1.6% |
| February | 91.7% | 82.1% | ▼ 10.4% |
| March | 86.2% | 85.3% | ▼ 1.1% |
| April | 71.4% | 86.4% | ▲ 21.0% |
| May | 90.3% | 90.3% | 0.0% |
| June | 83.3% | 90.0% | ▲ 8.0% |
| July | 90.3% | 86.7% | ▼ 4.0% |
| August | 90.3% | – | – |
| September | 96.7% | – | – |
| October | 90.3% | – | in progress |
| November | 89.7% | – | – |
| December | 87.1% | – | – |
| Year-to-date average (Jan–Jul) | 86.5% | 87.7% | ▲ 1.5% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 1 | 0 | ▼ 100.0% |
| 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) | 1 | 1 | 0.0% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
This number flies several legs
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 99.6% 707
- Cancelled 0.4% 3
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
88 of 8
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DEN SLC Denver International Airport – Salt Lake City International Airport | 628 | 8.0 min | 87.2% | 242 |
| FLL ORD Fort Lauderdale Hollywood International Airport – Chicago O'Hare International Airport | 1,905 | 6.1 min | 90.3% | 72 |
| RAP DEN Rapid City Regional Airport – Denver International Airport | 484 | 3.3 min | 87.7% | 58 |
| ORD RSW Chicago O'Hare International Airport – Southwest Florida International Airport | 1,807 | 4.6 min | 86.5% | 37 |
| IAD DFW Washington Dulles International Airport – Dallas Fort Worth International Airport | 1,883 | -3.1 min | 97.3% | 37 |
| GTF DEN Great Falls International Airport – Denver International Airport | 1,003 | 0.3 min | 91.7% | 36 |
| SLC ORD Salt Lake City International Airport – Chicago O'Hare International Airport | 2,006 | 31.7 min | 81.3% | 32 |
| ONT SFO Ontario International Airport – San Francisco International Airport | 585 | 0.1 min | 90.3% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 30 | 30 | 90.0% | 0 |
| November 2024 | 30 | 30 | 86.7% | 0 |
| December 2024 | 44 | 43 | 74.4% | 1 |
| January 2025 | 37 | 37 | 91.9% | 0 |
| February 2025 | 24 | 24 | 91.7% | 0 |
| March 2025 | 29 | 29 | 86.2% | 0 |
| April 2025 | 29 | 28 | 71.4% | 1 |
| May 2025 | 31 | 31 | 90.3% | 0 |
| June 2025 | 30 | 30 | 83.3% | 0 |
| July 2025 | 31 | 31 | 90.3% | 0 |
| August 2025 | 31 | 31 | 90.3% | 0 |
| September 2025 | 30 | 30 | 96.7% | 0 |
| October 2025 | 31 | 31 | 90.3% | 0 |
| November 2025 | 29 | 29 | 89.7% | 0 |
| December 2025 | 31 | 31 | 87.1% | 0 |
| January 2026 | 31 | 30 | 93.3% | 1 |
| February 2026 | 28 | 28 | 82.1% | 0 |
| March 2026 | 34 | 34 | 85.3% | 0 |
| April 2026 | 59 | 59 | 86.4% | 0 |
| May 2026 | 31 | 31 | 90.3% | 0 |
| June 2026 | 30 | 30 | 90.0% | 0 |
| July 2026 | 30 | 30 | 86.7% | 0 |