UA538
UA538 (United Airlines) is a multi-stop service on 26 routes, busiest Newark to San Francisco. Of 735 departures recorded from October 2024 to July 2026, 82.2% left on time, according to the US BTS.
- On-time departures82.2%of 735 flights
- Average delay15.5 min
- July 202631▼ 49.2%vs July 2025
- Cancelled1.5%
- Legs flown under this number26
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 | 31 | 0.0% |
| April | 30 | 30 | 0.0% |
| May | 21 | 31 | ▲ 47.6% |
| June | 33 | 30 | ▼ 9.1% |
| July | 61 | 31 | ▼ 49.2% |
| August | 80 | – | – |
| September | 31 | – | – |
| October | 30 | – | in progress |
| November | 28 | – | – |
| December | 38 | – | – |
| Year to date (Jan–Jul) | 235 | 212 | ▼ 9.8% |
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 | 75.9% | 89.7% | ▲ 18.2% |
| February | 92.9% | 92.3% | ▼ 0.6% |
| March | 87.1% | 93.3% | ▲ 7.2% |
| April | 73.3% | 100.0% | ▲ 36.4% |
| May | 47.6% | 96.7% | ▲ 103.0% |
| June | 81.8% | 56.7% | ▼ 30.7% |
| July | 67.8% | 90.3% | ▲ 33.2% |
| August | 85.0% | – | – |
| September | 83.9% | – | – |
| October | 80.0% | – | in progress |
| November | 92.6% | – | – |
| December | 71.1% | – | – |
| Year-to-date average (Jan–Jul) | 75.2% | 88.4% | ▲ 17.6% |
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 | 2 | 0.0% |
| February | 0 | 2 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 1 | – |
| June | 0 | 0 | – |
| July | 2 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 6 | ▲ 50.0% |
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 98.5% 724
- Cancelled 1.5% 11
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
10Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 30 | 30 | 86.7% | 0 |
| December 2024 | 31 | 31 | 77.4% | 0 |
| January 2025 | 31 | 29 | 75.9% | 2 |
| February 2025 | 28 | 28 | 92.9% | 0 |
| March 2025 | 31 | 31 | 87.1% | 0 |
| April 2025 | 30 | 30 | 73.3% | 0 |
| May 2025 | 21 | 21 | 47.6% | 0 |
| June 2025 | 33 | 33 | 81.8% | 0 |
| July 2025 | 61 | 59 | 67.8% | 2 |
| August 2025 | 80 | 80 | 85.0% | 0 |
| September 2025 | 31 | 31 | 83.9% | 0 |
| October 2025 | 30 | 30 | 80.0% | 0 |
| November 2025 | 28 | 27 | 92.6% | 1 |
| December 2025 | 38 | 38 | 71.1% | 0 |
| January 2026 | 31 | 29 | 89.7% | 2 |
| February 2026 | 28 | 26 | 92.3% | 2 |
| March 2026 | 31 | 30 | 93.3% | 1 |
| April 2026 | 30 | 30 | 100.0% | 0 |
| May 2026 | 31 | 30 | 96.7% | 1 |
| June 2026 | 30 | 30 | 56.7% | 0 |
| July 2026 | 31 | 31 | 90.3% | 0 |