UA644
UA644 (United Airlines) is a multi-stop service on 14 routes, busiest Denver to Portland. Of 1,065 departures recorded from October 2024 to July 2026, 86.2% left on time, according to the US BTS.
- On-time departures86.2%of 1,065 flights
- Average delay7.6 min
- July 202662▲ 0.0%vs July 2025
- Cancelled0.2%
- Legs flown under this number14
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 | 36 | ▲ 16.1% |
| February | 28 | 45 | ▲ 60.7% |
| March | 33 | 38 | ▲ 15.2% |
| April | 30 | 60 | ▲ 100.0% |
| May | 41 | 62 | ▲ 51.2% |
| June | 85 | 60 | ▼ 29.4% |
| July | 62 | 62 | 0.0% |
| August | 71 | – | – |
| September | 83 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 45 | – | – |
| Year to date (Jan–Jul) | 310 | 363 | ▲ 17.1% |
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 | 71.0% | 86.1% | ▲ 21.3% |
| February | 75.0% | 91.1% | ▲ 21.5% |
| March | 87.9% | 86.8% | ▼ 1.2% |
| April | 70.0% | 95.0% | ▲ 35.7% |
| May | 85.4% | 91.9% | ▲ 7.7% |
| June | 90.6% | 91.7% | ▲ 1.2% |
| July | 88.3% | 85.5% | ▼ 3.2% |
| August | 87.3% | – | – |
| September | 80.7% | – | – |
| October | 93.6% | – | in progress |
| November | 100.0% | – | – |
| December | 84.4% | – | – |
| Year-to-date average (Jan–Jul) | 81.2% | 89.7% | ▲ 10.6% |
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 | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 2 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 0 | ▼ 100.0% |
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 99.8% 1,063
- Cancelled 0.2% 2
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
99 of 9
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DEN PDX Denver International Airport – Portland International Airport | 1,592 | 7.3 min | 85.2% | 547 |
| PDX SFO Portland International Airport – San Francisco International Airport | 886 | 19.4 min | 81.6% | 136 |
| DFW DEN Dallas Fort Worth International Airport – Denver International Airport | 1,032 | 2.2 min | 90.3% | 93 |
| BNA IAH Nashville International Airport – George Bush Intercontinental Airport | 1,057 | -1.9 min | 94.2% | 52 |
| LGA DEN LaGuardia Airport – Denver International Airport | 2,600 | 2.3 min | 88.9% | 38 |
| SFO EUG San Francisco International Airport – Eugene Airport | 727 | 21.1 min | 78.4% | 37 |
| MIA DEN Miami International Airport – Denver International Airport | 2,749 | 1.5 min | 89.2% | 37 |
| SFO SAN San Francisco International Airport – San Diego International Airport | 719 | 14.2 min | 77.8% | 36 |
| SFO PIT San Francisco International Airport – Pittsburgh International Airport | 3,618 | -0.7 min | 97.0% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 25 | 25 | 76.0% | 0 |
| November 2024 | 59 | 59 | 78.0% | 0 |
| December 2024 | 48 | 48 | 83.3% | 0 |
| January 2025 | 31 | 31 | 71.0% | 0 |
| February 2025 | 28 | 28 | 75.0% | 0 |
| March 2025 | 33 | 33 | 87.9% | 0 |
| April 2025 | 30 | 30 | 70.0% | 0 |
| May 2025 | 41 | 41 | 85.4% | 0 |
| June 2025 | 85 | 85 | 90.6% | 0 |
| July 2025 | 62 | 60 | 88.3% | 2 |
| August 2025 | 71 | 71 | 87.3% | 0 |
| September 2025 | 83 | 83 | 80.7% | 0 |
| October 2025 | 31 | 31 | 93.6% | 0 |
| November 2025 | 30 | 30 | 100.0% | 0 |
| December 2025 | 45 | 45 | 84.4% | 0 |
| January 2026 | 36 | 36 | 86.1% | 0 |
| February 2026 | 45 | 45 | 91.1% | 0 |
| March 2026 | 38 | 38 | 86.8% | 0 |
| April 2026 | 60 | 60 | 95.0% | 0 |
| May 2026 | 62 | 62 | 91.9% | 0 |
| June 2026 | 60 | 60 | 91.7% | 0 |
| July 2026 | 62 | 62 | 85.5% | 0 |