UA1538
UA1538 (United Airlines) is a multi-stop service on 9 routes, busiest Miami to Dulles. Of 297 departures recorded from March 2025 to July 2026, 80.6% left on time, according to the US BTS.
- On-time departures80.6%of 297 flights
- Average delay12.9 min
- July 202631▲ 0.0%vs July 2025
- Cancelled1.0%
- Legs flown under this number9
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods13 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | 31 | – |
| February | – | 28 | – |
| March | 24 | 31 | ▲ 29.2% |
| April | – | 29 | – |
| May | 1 | 24 | ▲ 2,300.0% |
| June | 5 | 30 | ▲ 500.0% |
| July | 31 | 31 | 0.0% |
| August | 18 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | 14 | – | – |
according to the US BTS · March 2025 → July 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods13 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | 87.1% | – |
| February | – | 85.7% | – |
| March | 70.8% | 61.3% | ▼ 13.5% |
| April | – | 93.1% | – |
| May | 100.0% | 87.5% | ▼ 12.5% |
| June | 80.0% | 76.7% | ▼ 4.2% |
| July | 80.0% | 75.9% | ▼ 5.2% |
| August | 83.3% | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | 92.9% | – | – |
according to the US BTS · March 2025 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · March 2025 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods13 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | 0 | – |
| February | – | 0 | – |
| March | 0 | 0 | – |
| April | – | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 2 | ▲ 100.0% |
| August | 0 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | 0 | – | – |
according to the US BTS · March 2025 → 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% 294
- Cancelled 1.0% 3
Share of all recorded flights in the period, all legs. · Mar 6, 2025 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| MIA IAD Miami International Airport – Washington Dulles International Airport | 1,486 | 12.1 min | 80.2% | 91 |
| ORD SAV Chicago O'Hare International Airport – Savannah Hilton Head International Airport | 1,246 | 11.9 min | 81.1% | 54 |
| ORD FLL Chicago O'Hare International Airport – Fort Lauderdale Hollywood International Airport | 1,905 | 6.0 min | 89.2% | 37 |
| EWR BZN Newark Liberty International Airport – Bozeman Yellowstone International Airport | 3,021 | 10.5 min | 77.1% | 37 |
| EWR AUS Newark Liberty International Airport – Austin Bergstrom International Airport | 2,416 | 23.5 min | 75.8% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| March 2025 | 24 | 24 | 70.8% | 0 |
| May 2025 | 1 | 1 | 100.0% | 0 |
| June 2025 | 5 | 5 | 80.0% | 0 |
| July 2025 | 31 | 30 | 80.0% | 1 |
| August 2025 | 18 | 18 | 83.3% | 0 |
| December 2025 | 14 | 14 | 92.9% | 0 |
| January 2026 | 31 | 31 | 87.1% | 0 |
| February 2026 | 28 | 28 | 85.7% | 0 |
| March 2026 | 31 | 31 | 61.3% | 0 |
| April 2026 | 29 | 29 | 93.1% | 0 |
| May 2026 | 24 | 24 | 87.5% | 0 |
| June 2026 | 30 | 30 | 76.7% | 0 |
| July 2026 | 31 | 29 | 75.9% | 2 |