UA2138
UA2138 (United Airlines) is a multi-stop service on 23 routes, busiest Bozeman to Chicago. Of 885 departures recorded from October 2024 to July 2026, 85.1% left on time, according to the US BTS.
- On-time departures85.1%of 885 flights
- Average delay11.6 min
- July 202631▼ 50.0%vs July 2025
- Cancelled1.7%
- Legs flown under this number23
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 | 57 | ▲ 83.9% |
| February | 38 | 55 | ▲ 44.7% |
| March | 32 | 59 | ▲ 84.4% |
| April | 26 | 30 | ▲ 15.4% |
| May | 29 | 31 | ▲ 6.9% |
| June | 35 | 30 | ▼ 14.3% |
| July | 62 | 31 | ▼ 50.0% |
| August | 62 | – | – |
| September | 60 | – | – |
| October | 60 | – | in progress |
| November | 45 | – | – |
| December | 36 | – | – |
| Year to date (Jan–Jul) | 253 | 293 | ▲ 15.8% |
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 | 86.2% | 85.7% | ▼ 0.6% |
| February | 86.8% | 89.1% | ▲ 2.6% |
| March | 81.3% | 85.7% | ▲ 5.5% |
| April | 84.6% | 90.0% | ▲ 6.4% |
| May | 96.6% | 86.7% | ▼ 10.2% |
| June | 88.6% | 83.3% | ▼ 5.9% |
| July | 76.7% | 83.9% | ▲ 9.4% |
| August | 79.3% | – | – |
| September | 85.0% | – | – |
| October | 85.0% | – | in progress |
| November | 74.4% | – | – |
| December | 80.6% | – | – |
| Year-to-date average (Jan–Jul) | 85.8% | 86.3% | ▲ 0.6% |
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 | 2 | 1 | ▼ 50.0% |
| February | 0 | 0 | – |
| March | 0 | 3 | – |
| April | 0 | 0 | – |
| May | 0 | 1 | – |
| June | 0 | 0 | – |
| July | 2 | 0 | ▼ 100.0% |
| August | 4 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 5 | ▲ 25.0% |
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 98.3% 870
- Cancelled 1.7% 15
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
12Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 25 | 25 | 96.0% | 0 |
| December 2024 | 31 | 31 | 90.3% | 0 |
| January 2025 | 31 | 29 | 86.2% | 2 |
| February 2025 | 38 | 38 | 86.8% | 0 |
| March 2025 | 32 | 32 | 81.3% | 0 |
| April 2025 | 26 | 26 | 84.6% | 0 |
| May 2025 | 29 | 29 | 96.6% | 0 |
| June 2025 | 35 | 35 | 88.6% | 0 |
| July 2025 | 62 | 60 | 76.7% | 2 |
| August 2025 | 62 | 58 | 79.3% | 4 |
| September 2025 | 60 | 60 | 85.0% | 0 |
| October 2025 | 60 | 60 | 85.0% | 0 |
| November 2025 | 45 | 43 | 74.4% | 2 |
| December 2025 | 36 | 36 | 80.6% | 0 |
| January 2026 | 57 | 56 | 85.7% | 1 |
| February 2026 | 55 | 55 | 89.1% | 0 |
| March 2026 | 59 | 56 | 85.7% | 3 |
| April 2026 | 30 | 30 | 90.0% | 0 |
| May 2026 | 31 | 30 | 86.7% | 1 |
| June 2026 | 30 | 30 | 83.3% | 0 |
| July 2026 | 31 | 31 | 83.9% | 0 |