UA2173
UA2173 (United Airlines) is a multi-stop service on 2 routes, busiest Boise to Denver. Of 780 departures recorded from October 2024 to July 2026, 75.8% left on time, according to the US BTS.
- On-time departures75.8%of 780 flights
- Average delay21.4 min
- July 202661▲ 96.8%vs July 2025
- Cancelled0.4%
- Legs flown under this number2
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 | 34 | ▲ 9.7% |
| April | 30 | 60 | ▲ 100.0% |
| May | 31 | 62 | ▲ 100.0% |
| June | 30 | 60 | ▲ 100.0% |
| July | 31 | 61 | ▲ 96.8% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 212 | 336 | ▲ 58.5% |
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 | 77.4% | 83.9% | ▲ 8.3% |
| February | 82.1% | 89.3% | ▲ 8.7% |
| March | 93.6% | 82.4% | ▼ 12.0% |
| April | 76.7% | 81.7% | ▲ 6.5% |
| May | 61.3% | 72.1% | ▲ 17.7% |
| June | 63.3% | 66.7% | ▲ 5.3% |
| July | 74.2% | 50.0% | ▼ 32.6% |
| August | 61.3% | – | – |
| September | 70.0% | – | – |
| October | 90.3% | – | in progress |
| November | 89.7% | – | – |
| December | 77.4% | – | – |
| Year-to-date average (Jan–Jul) | 75.5% | 75.1% | ▼ 0.5% |
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 | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 1 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 2 |
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 99.6% 777
- 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
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BOI DEN Boise Air Terminal/Gowen Field – Denver International Airport | 1,042 | 17.6 min | 78.8% | 656 |
| DEN HDN Denver International Airport – Yampa Valley Airport | 227 | 41.3 min | 60.2% | 124 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 29 | 28 | 82.1% | 1 |
| December 2024 | 31 | 31 | 87.1% | 0 |
| January 2025 | 31 | 31 | 77.4% | 0 |
| February 2025 | 28 | 28 | 82.1% | 0 |
| March 2025 | 31 | 31 | 93.6% | 0 |
| April 2025 | 30 | 30 | 76.7% | 0 |
| May 2025 | 31 | 31 | 61.3% | 0 |
| June 2025 | 30 | 30 | 63.3% | 0 |
| July 2025 | 31 | 31 | 74.2% | 0 |
| August 2025 | 31 | 31 | 61.3% | 0 |
| September 2025 | 30 | 30 | 70.0% | 0 |
| October 2025 | 31 | 31 | 90.3% | 0 |
| November 2025 | 29 | 29 | 89.7% | 0 |
| December 2025 | 31 | 31 | 77.4% | 0 |
| January 2026 | 31 | 31 | 83.9% | 0 |
| February 2026 | 28 | 28 | 89.3% | 0 |
| March 2026 | 34 | 34 | 82.4% | 0 |
| April 2026 | 60 | 60 | 81.7% | 0 |
| May 2026 | 62 | 61 | 72.1% | 1 |
| June 2026 | 60 | 60 | 66.7% | 0 |
| July 2026 | 61 | 60 | 50.0% | 1 |