UA643
UA643 (United Airlines) is a multi-stop service on 13 routes, busiest Denver to Wichita. Of 1,212 departures recorded from October 2024 to July 2026, 84.6% left on time, according to the US BTS.
- On-time departures84.6%of 1,212 flights
- Average delay8.7 min
- July 202691▲ 46.8%vs July 2025
- Cancelled0.3%
- Legs flown under this number13
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 | 93 | ▲ 200.0% |
| February | 28 | 84 | ▲ 200.0% |
| March | 31 | 69 | ▲ 122.6% |
| April | 30 | 90 | ▲ 200.0% |
| May | 31 | 91 | ▲ 193.5% |
| June | 35 | 85 | ▲ 142.9% |
| July | 62 | 91 | ▲ 46.8% |
| August | 57 | – | – |
| September | 78 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 75 | – | – |
| Year to date (Jan–Jul) | 248 | 603 | ▲ 143.1% |
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 | 80.0% | 91.4% | ▲ 14.3% |
| February | 78.6% | 92.9% | ▲ 18.2% |
| March | 77.4% | 94.2% | ▲ 21.7% |
| April | 73.3% | 92.2% | ▲ 25.8% |
| May | 66.7% | 91.1% | ▲ 36.7% |
| June | 62.9% | 78.8% | ▲ 25.4% |
| July | 67.7% | 90.1% | ▲ 33.0% |
| August | 71.9% | – | – |
| September | 80.8% | – | – |
| October | 87.1% | – | in progress |
| November | 96.7% | – | – |
| December | 88.0% | – | – |
| Year-to-date average (Jan–Jul) | 72.4% | 90.1% | ▲ 24.5% |
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 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 1 | 1 | 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) | 2 | 1 | ▼ 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 99.8% 1,209
- Cancelled 0.2% 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
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DEN ICT Denver International Airport – Wichita Dwight D. Eisenhower National Airport | 674 | 25.8 min | 69.7% | 292 |
| SFO SNA San Francisco International Airport – John Wayne Orange County International Airport | 598 | 4.6 min | 87.8% | 279 |
| SNA IAH John Wayne Orange County International Airport – George Bush Intercontinental Airport | 2,163 | 2.6 min | 87.1% | 201 |
| LAS SFO Harry Reid International Airport – San Francisco International Airport | 665 | -1.6 min | 97.5% | 199 |
| SNA DEN John Wayne Orange County International Airport – Denver International Airport | 1,360 | 10.1 min | 84.9% | 73 |
| DEN PHX Denver International Airport – Phoenix Sky Harbor International Airport | 968 | 7.7 min | 83.6% | 55 |
| PIT SFO Pittsburgh International Airport – San Francisco International Airport | 3,618 | -4.2 min | 97.3% | 37 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 28 | 28 | 85.7% | 0 |
| December 2024 | 42 | 42 | 85.7% | 0 |
| January 2025 | 31 | 30 | 80.0% | 1 |
| February 2025 | 28 | 28 | 78.6% | 0 |
| March 2025 | 31 | 31 | 77.4% | 0 |
| April 2025 | 30 | 30 | 73.3% | 0 |
| May 2025 | 31 | 30 | 66.7% | 1 |
| June 2025 | 35 | 35 | 62.9% | 0 |
| July 2025 | 62 | 62 | 67.7% | 0 |
| August 2025 | 57 | 57 | 71.9% | 0 |
| September 2025 | 78 | 78 | 80.8% | 0 |
| October 2025 | 31 | 31 | 87.1% | 0 |
| November 2025 | 30 | 30 | 96.7% | 0 |
| December 2025 | 75 | 75 | 88.0% | 0 |
| January 2026 | 93 | 93 | 91.4% | 0 |
| February 2026 | 84 | 84 | 92.9% | 0 |
| March 2026 | 69 | 69 | 94.2% | 0 |
| April 2026 | 90 | 90 | 92.2% | 0 |
| May 2026 | 91 | 90 | 91.1% | 1 |
| June 2026 | 85 | 85 | 78.8% | 0 |
| July 2026 | 91 | 91 | 90.1% | 0 |