UA1663
UA1663 (United Airlines) is a multi-stop service on 17 routes, busiest Houston to Philadelphia. Of 738 departures recorded from October 2024 to July 2026, 76.6% left on time, according to the US BTS.
- On-time departures76.6%of 738 flights
- Average delay16.3 min
- July 202631▲ 0.0%vs July 2025
- Cancelled1.1%
- 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 | 31 | 31 | 0.0% |
| February | 28 | 28 | 0.0% |
| March | 31 | 31 | 0.0% |
| April | 30 | 30 | 0.0% |
| May | 52 | 31 | ▼ 40.4% |
| June | 55 | 30 | ▼ 45.5% |
| July | 31 | 31 | 0.0% |
| August | 30 | – | – |
| September | 53 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 258 | 212 | ▼ 17.8% |
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 | 80.7% | 93.1% | ▲ 15.4% |
| February | 82.1% | 77.8% | ▼ 5.3% |
| March | 87.1% | 73.3% | ▼ 15.8% |
| April | 60.0% | 83.3% | ▲ 38.9% |
| May | 74.0% | 71.0% | ▼ 4.1% |
| June | 56.6% | 53.3% | ▼ 5.8% |
| July | 96.8% | 48.4% | ▼ 50.0% |
| August | 66.7% | – | – |
| September | 83.0% | – | – |
| October | 74.2% | – | in progress |
| November | 65.5% | – | – |
| December | 93.6% | – | – |
| Year-to-date average (Jan–Jul) | 76.8% | 71.5% | ▼ 6.9% |
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 | 2 | – |
| February | 0 | 1 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 2 | 0 | ▼ 100.0% |
| June | 2 | 0 | ▼ 100.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 4 | 0.0% |
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 98.9% 730
- Cancelled 1.1% 8
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| IAH PHL George Bush Intercontinental Airport – Philadelphia International Airport | 2,130 | 19.1 min | 71.8% | 391 |
| ORD ATL Chicago O'Hare International Airport – Hartsfield Jackson Atlanta International Airport | 976 | 0.9 min | 94.6% | 37 |
| JAC DEN Jackson Hole Airport – Denver International Airport | 653 | 16.2 min | 81.1% | 37 |
| IAD ATL Washington Dulles International Airport – Hartsfield Jackson Atlanta International Airport | 859 | -0.7 min | 94.4% | 36 |
| EWR FLL Newark Liberty International Airport – Fort Lauderdale Hollywood International Airport | 1,717 | 24.8 min | 71.0% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 33 | 33 | 93.9% | 0 |
| November 2024 | 30 | 30 | 93.3% | 0 |
| December 2024 | 31 | 31 | 87.1% | 0 |
| January 2025 | 31 | 31 | 80.7% | 0 |
| February 2025 | 28 | 28 | 82.1% | 0 |
| March 2025 | 31 | 31 | 87.1% | 0 |
| April 2025 | 30 | 30 | 60.0% | 0 |
| May 2025 | 52 | 50 | 74.0% | 2 |
| June 2025 | 55 | 53 | 56.6% | 2 |
| July 2025 | 31 | 31 | 96.8% | 0 |
| August 2025 | 30 | 30 | 66.7% | 0 |
| September 2025 | 53 | 53 | 83.0% | 0 |
| October 2025 | 31 | 31 | 74.2% | 0 |
| November 2025 | 29 | 29 | 65.5% | 0 |
| December 2025 | 31 | 31 | 93.6% | 0 |
| January 2026 | 31 | 29 | 93.1% | 2 |
| February 2026 | 28 | 27 | 77.8% | 1 |
| March 2026 | 31 | 30 | 73.3% | 1 |
| April 2026 | 30 | 30 | 83.3% | 0 |
| May 2026 | 31 | 31 | 71.0% | 0 |
| June 2026 | 30 | 30 | 53.3% | 0 |
| July 2026 | 31 | 31 | 48.4% | 0 |