UA377
UA377 (United Airlines) is a multi-stop service on 16 routes, busiest Denver to Chicago. Of 881 departures recorded from October 2024 to July 2026, 75.5% left on time, according to the US BTS.
- On-time departures75.5%of 881 flights
- Average delay15.7 min
- July 202631▲ 0.0%vs July 2025
- Cancelled0.3%
- Legs flown under this number16
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 | 31 | 57 | ▲ 83.9% |
| February | 28 | 56 | ▲ 100.0% |
| March | 55 | 59 | ▲ 7.3% |
| April | 30 | 30 | 0.0% |
| May | 41 | 31 | ▼ 24.4% |
| June | 55 | 30 | ▼ 45.5% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 35 | – | – |
| October | 62 | – | in progress |
| November | 59 | – | – |
| December | 48 | – | – |
| Year to date (Jan–Jul) | 271 | 294 | ▲ 8.5% |
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 | 77.4% | 87.7% | ▲ 13.3% |
| February | 75.0% | 76.8% | ▲ 2.4% |
| March | 78.2% | 78.0% | ▼ 0.3% |
| April | 73.3% | 93.3% | ▲ 27.3% |
| May | 52.5% | 83.9% | ▲ 59.8% |
| June | 45.5% | 83.3% | ▲ 83.3% |
| July | 54.8% | 66.7% | ▲ 21.6% |
| August | 58.1% | – | – |
| September | 65.7% | – | – |
| October | 85.5% | – | in progress |
| November | 81.0% | – | – |
| December | 81.3% | – | – |
| Year-to-date average (Jan–Jul) | 65.2% | 81.4% | ▲ 24.7% |
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 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| 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 99.7% 878
- Cancelled 0.3% 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 ORD Denver International Airport – Chicago O'Hare International Airport | 1,426 | 17.6 min | 73.6% | 521 |
| IND DEN Indianapolis International Airport – Denver International Airport | 1,568 | 3.0 min | 87.2% | 94 |
| SFO DEN San Francisco International Airport – Denver International Airport | 1,553 | 6.4 min | 83.8% | 37 |
| PSP DEN Palm Springs International Airport – Denver International Airport | 1,247 | 15.7 min | 78.4% | 37 |
| MSN DEN Dane County Regional Truax Field – Denver International Airport | 1,326 | 0.1 min | 91.9% | 37 |
| SNA DEN John Wayne Orange County International Airport – Denver International Airport | 1,360 | 59.7 min | 40.0% | 35 |
| SLC DEN Salt Lake City International Airport – Denver International Airport | 628 | 2.8 min | 83.3% | 30 |
| ORD DEN Chicago O'Hare International Airport – Denver International Airport | 1,426 | 28.4 min | 65.5% | 30 |
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 | 87.1% | 0 |
| January 2025 | 31 | 31 | 77.4% | 0 |
| February 2025 | 28 | 28 | 75.0% | 0 |
| March 2025 | 55 | 55 | 78.2% | 0 |
| April 2025 | 30 | 30 | 73.3% | 0 |
| May 2025 | 41 | 40 | 52.5% | 1 |
| June 2025 | 55 | 55 | 45.5% | 0 |
| July 2025 | 31 | 31 | 54.8% | 0 |
| August 2025 | 31 | 31 | 58.1% | 0 |
| September 2025 | 35 | 35 | 65.7% | 0 |
| October 2025 | 62 | 62 | 85.5% | 0 |
| November 2025 | 59 | 58 | 81.0% | 1 |
| December 2025 | 48 | 48 | 81.3% | 0 |
| January 2026 | 57 | 57 | 87.7% | 0 |
| February 2026 | 56 | 56 | 76.8% | 0 |
| March 2026 | 59 | 59 | 78.0% | 0 |
| April 2026 | 30 | 30 | 93.3% | 0 |
| May 2026 | 31 | 31 | 83.9% | 0 |
| June 2026 | 30 | 30 | 83.3% | 0 |
| July 2026 | 31 | 30 | 66.7% | 1 |