UA512
UA512 (United Airlines) is a multi-stop service on 12 routes, busiest San Francisco to Houston. Of 1,005 departures recorded from October 2024 to July 2026, 85.7% left on time, according to the US BTS.
- On-time departures85.7%of 1,005 flights
- Average delay7.0 min
- July 202631▼ 49.2%vs July 2025
- Cancelled1.0%
- Legs flown under this number12
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 62 | ▲ 100.0% |
| February | 28 | 55 | ▲ 96.4% |
| March | 33 | 35 | ▲ 6.1% |
| April | 56 | 30 | ▼ 46.4% |
| May | 72 | 31 | ▼ 56.9% |
| June | 84 | 30 | ▼ 64.3% |
| July | 61 | 31 | ▼ 49.2% |
| August | 49 | – | – |
| September | 30 | – | – |
| October | 36 | – | in progress |
| November | 58 | – | – |
| December | 62 | – | – |
| Year to date (Jan–Jul) | 365 | 274 | ▼ 24.9% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 75.9% | 86.7% | ▲ 14.2% |
| February | 82.1% | 98.2% | ▲ 19.5% |
| March | 84.9% | 94.3% | ▲ 11.1% |
| April | 92.9% | 96.7% | ▲ 4.1% |
| May | 94.4% | 90.3% | ▼ 4.4% |
| June | 78.3% | 79.3% | ▲ 1.3% |
| July | 77.1% | 70.0% | ▼ 9.1% |
| August | 78.7% | – | – |
| September | 93.3% | – | – |
| October | 83.3% | – | in progress |
| November | 94.7% | – | – |
| December | 87.1% | – | – |
| Year-to-date average (Jan–Jul) | 83.6% | 87.9% | ▲ 5.1% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 2 | 0.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 1 | 0.0% |
| July | 0 | 1 | – |
| August | 2 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 3 | 4 | ▲ 33.3% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
This number flies several legs
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 99.0% 995
- Cancelled 1.0% 10
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
99 of 9
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SFO IAH San Francisco International Airport – George Bush Intercontinental Airport | 2,627 | 7.7 min | 82.1% | 422 |
| IAH DCA George Bush Intercontinental Airport – Ronald Reagan Washington National Airport | 1,942 | 2.2 min | 92.5% | 295 |
| IAH LGA George Bush Intercontinental Airport – LaGuardia Airport | 2,277 | -0.1 min | 95.2% | 42 |
| IAH JAX George Bush Intercontinental Airport – Jacksonville International Airport | 1,312 | 1.7 min | 92.9% | 42 |
| DFW IAH Dallas Fort Worth International Airport – George Bush Intercontinental Airport | 362 | 15.9 min | 80.0% | 37 |
| BOS SFO Boston Logan International Airport – San Francisco International Airport | 4,341 | 25.9 min | 69.4% | 37 |
| IAH ORD George Bush Intercontinental Airport – Chicago O'Hare International Airport | 1,491 | 5.8 min | 91.4% | 35 |
| CID ORD The Eastern Iowa Airport – Chicago O'Hare International Airport | 315 | 21.2 min | 82.4% | 35 |
| ORD ATL Chicago O'Hare International Airport – Hartsfield Jackson Atlanta International Airport | 976 | 10.2 min | 75.8% | 34 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 25 | 25 | 80.0% | 0 |
| November 2024 | 59 | 59 | 81.4% | 0 |
| December 2024 | 47 | 47 | 78.7% | 0 |
| January 2025 | 31 | 29 | 75.9% | 2 |
| February 2025 | 28 | 28 | 82.1% | 0 |
| March 2025 | 33 | 33 | 84.9% | 0 |
| April 2025 | 56 | 56 | 92.9% | 0 |
| May 2025 | 72 | 72 | 94.4% | 0 |
| June 2025 | 84 | 83 | 78.3% | 1 |
| July 2025 | 61 | 61 | 77.1% | 0 |
| August 2025 | 49 | 47 | 78.7% | 2 |
| September 2025 | 30 | 30 | 93.3% | 0 |
| October 2025 | 36 | 36 | 83.3% | 0 |
| November 2025 | 58 | 57 | 94.7% | 1 |
| December 2025 | 62 | 62 | 87.1% | 0 |
| January 2026 | 62 | 60 | 86.7% | 2 |
| February 2026 | 55 | 55 | 98.2% | 0 |
| March 2026 | 35 | 35 | 94.3% | 0 |
| April 2026 | 30 | 30 | 96.7% | 0 |
| May 2026 | 31 | 31 | 90.3% | 0 |
| June 2026 | 30 | 29 | 79.3% | 1 |
| July 2026 | 31 | 30 | 70.0% | 1 |