UA1156
UA1156 (United Airlines) is a multi-stop service on 16 routes, busiest St Louis to Chicago. Of 950 departures recorded from October 2024 to July 2026, 71.9% left on time, according to the US BTS.
- On-time departures71.9%of 950 flights
- Average delay23.3 min
- July 202631▼ 48.3%vs July 2025
- Cancelled1.6%
- Legs flown under this number16
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 | 57 | 52 | ▼ 8.8% |
| April | 60 | 56 | ▼ 6.7% |
| May | 62 | 71 | ▲ 14.5% |
| June | 60 | 30 | ▼ 50.0% |
| July | 60 | 31 | ▼ 48.3% |
| August | 62 | – | – |
| September | 54 | – | – |
| October | 37 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 358 | 299 | ▼ 16.5% |
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 | 87.1% | 80.0% | ▼ 8.2% |
| February | 81.5% | 71.4% | ▼ 12.3% |
| March | 75.4% | 61.5% | ▼ 18.4% |
| April | 69.5% | 75.9% | ▲ 9.3% |
| May | 67.7% | 84.5% | ▲ 24.8% |
| June | 56.7% | 58.6% | ▲ 3.4% |
| July | 45.0% | 65.4% | ▲ 45.3% |
| August | 67.8% | – | – |
| September | 68.5% | – | – |
| October | 86.5% | – | in progress |
| November | 92.9% | – | – |
| December | 77.4% | – | – |
| Year-to-date average (Jan–Jul) | 69.0% | 71.1% | ▲ 3.0% |
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 | 1 | – |
| February | 1 | 0 | ▼ 100.0% |
| March | 0 | 0 | – |
| April | 1 | 2 | ▲ 100.0% |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 0 | 5 | – |
| August | 3 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 9 | ▲ 350.0% |
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 98.4% 935
- Cancelled 1.6% 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
9Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 75.0% | 0 |
| November 2024 | 29 | 29 | 75.9% | 0 |
| December 2024 | 31 | 31 | 93.6% | 0 |
| January 2025 | 31 | 31 | 87.1% | 0 |
| February 2025 | 28 | 27 | 81.5% | 1 |
| March 2025 | 57 | 57 | 75.4% | 0 |
| April 2025 | 60 | 59 | 69.5% | 1 |
| May 2025 | 62 | 62 | 67.7% | 0 |
| June 2025 | 60 | 60 | 56.7% | 0 |
| July 2025 | 60 | 60 | 45.0% | 0 |
| August 2025 | 62 | 59 | 67.8% | 3 |
| September 2025 | 54 | 54 | 68.5% | 0 |
| October 2025 | 37 | 37 | 86.5% | 0 |
| November 2025 | 29 | 28 | 92.9% | 1 |
| December 2025 | 31 | 31 | 77.4% | 0 |
| January 2026 | 31 | 30 | 80.0% | 1 |
| February 2026 | 28 | 28 | 71.4% | 0 |
| March 2026 | 52 | 52 | 61.5% | 0 |
| April 2026 | 56 | 54 | 75.9% | 2 |
| May 2026 | 71 | 71 | 84.5% | 0 |
| June 2026 | 30 | 29 | 58.6% | 1 |
| July 2026 | 31 | 26 | 65.4% | 5 |