UA2179
UA2179 (United Airlines) is a multi-stop service on 17 routes, busiest Chicago to San Francisco. Of 1,461 departures recorded from October 2024 to July 2026, 72.2% left on time, according to the US BTS.
- On-time departures72.2%of 1,461 flights
- Average delay19.8 min
- July 202692▲ 48.4%vs July 2025
- Cancelled1.0%
- Legs flown under this number17
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 | 56 | 88 | ▲ 57.1% |
| February | 56 | 84 | ▲ 50.0% |
| March | 62 | 85 | ▲ 37.1% |
| April | 60 | 89 | ▲ 48.3% |
| May | 62 | 59 | ▼ 4.8% |
| June | 60 | 66 | ▲ 10.0% |
| July | 62 | 92 | ▲ 48.4% |
| August | 75 | – | – |
| September | 90 | – | – |
| October | 43 | – | in progress |
| November | 88 | – | – |
| December | 68 | – | – |
| Year to date (Jan–Jul) | 418 | 563 | ▲ 34.7% |
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 | 86.8% | 74.1% | ▼ 14.6% |
| February | 85.7% | 67.9% | ▼ 20.8% |
| March | 77.4% | 73.5% | ▼ 5.1% |
| April | 80.0% | 75.0% | ▼ 6.3% |
| May | 80.7% | 47.5% | ▼ 41.2% |
| June | 68.3% | 53.9% | ▼ 21.2% |
| July | 65.6% | 55.6% | ▼ 15.3% |
| August | 74.7% | – | – |
| September | 80.0% | – | – |
| October | 90.7% | – | in progress |
| November | 66.7% | – | – |
| December | 66.2% | – | – |
| Year-to-date average (Jan–Jul) | 77.8% | 63.9% | ▼ 17.8% |
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 | 3 | 3 | 0.0% |
| February | 0 | 0 | – |
| March | 0 | 2 | – |
| April | 0 | 1 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 1 | 2 | ▲ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 9 | ▲ 125.0% |
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 99.0% 1,447
- Cancelled 1.0% 14
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 | 25 | 25 | 88.0% | 0 |
| November 2024 | 58 | 58 | 86.2% | 0 |
| December 2024 | 33 | 33 | 63.6% | 0 |
| January 2025 | 56 | 53 | 86.8% | 3 |
| February 2025 | 56 | 56 | 85.7% | 0 |
| March 2025 | 62 | 62 | 77.4% | 0 |
| April 2025 | 60 | 60 | 80.0% | 0 |
| May 2025 | 62 | 62 | 80.7% | 0 |
| June 2025 | 60 | 60 | 68.3% | 0 |
| July 2025 | 62 | 61 | 65.6% | 1 |
| August 2025 | 75 | 75 | 74.7% | 0 |
| September 2025 | 90 | 90 | 80.0% | 0 |
| October 2025 | 43 | 43 | 90.7% | 0 |
| November 2025 | 88 | 87 | 66.7% | 1 |
| December 2025 | 68 | 68 | 66.2% | 0 |
| January 2026 | 88 | 85 | 74.1% | 3 |
| February 2026 | 84 | 84 | 67.9% | 0 |
| March 2026 | 85 | 83 | 73.5% | 2 |
| April 2026 | 89 | 88 | 75.0% | 1 |
| May 2026 | 59 | 59 | 47.5% | 0 |
| June 2026 | 66 | 65 | 53.9% | 1 |
| July 2026 | 92 | 90 | 55.6% | 2 |