| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Jul 18 | IAH | PHL | 19:47 | 22:43 |
En-Route
|
Track > |
| Jul 17 | IAH | PHL | 18:49 | 23:02 |
Landed Late
|
Track > |
| Jul 11 | IAH | PHL | 18:19 | 22:05 |
Landed
|
Track > |
| Jul 10 | IAH | PHL | 19:22 | 23:09 |
Landed Late
|
Track > |
| Jul 03 | IAH | PHL | 18:19 | 22:09 |
Landed
|
Track > |
| Jun 27 | IAH | PHL | 18:17 | 22:07 |
Landed
|
Track > |
| Jun 26 | IAH | PHL | 18:35 | 22:24 |
Landed
|
Track > |
| Jun 20 | IAH | PHL | 18:25 | 22:10 |
Landed
|
Track > |
| Jun 19 | IAH | PHL | 20:26 | 00:11 |
Delayed
|
Track > |
| Jun 13 | IAH | PHL | 18:22 | 22:16 |
Landed
|
Track > |
United Airlines Flight UA3991 connects Houston, United States to Philadelphia, United States, taking off from Houston George Bush Intercontinental Airport IAH and landing at Philadelphia International Airport PHL.
How long is the UA3991 flight from Houston to Philadelphia?
The average flight time from Houston to Philadelphia is 2 hours and 51 minutes. The flight distance is 2129 km / 1323 miles and the average flight speed is 732 km/h / 455 mph.
How many UA3991 flights are operated per week?
2 flights per week. The flight UA3991 is operated on Friday and Saturday.
What is the On-Time Performance (OTP) of United Airlines Flight UA3991 Houston to Philadelphia?
The Airportia On-Time Performance Rating for United Airlines Flight UA3991 is 4.8/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight UA3991 arriving at?
Flight UA3991 arrives at Philadelphia International Airport (PHL) Terminal D.
When was the latest UA3991 flight?
The latest flight took off on Sunday, July 19th, 2026 with the flight status being En-Route on 22:43.
How else can the flight UA3991 be referenced as?
This United Airlines flight can also be referenced as UAL3991, UA 3991, UAL 3991.
How often is flight UA3991 delayed?
On average, 30% of all UA3991 flights are delayed. The average delay is 44 minutes.
Can I get compensation for my delayed or cancelled UA3991 flight or baggage issues?
If your UA3991 flight was cancelled, delayed, or if you experienced baggage issues such as delayed, damaged, or lost bags, you may be entitled to compensation. Compensation amounts and eligibility depend on various regulations, including EC 261/2004, UK261, CA Montreal Convention, US GoodWill, BR-ANAC, SA-GACA and TK-SHY.
See our UA3991 Flight Tracker above for more details.
Flight UA3991 is code-shared by 1 airline using the flight number NZ6863
Other flights departing from Houston IAH: UA349, UA1341, UA4832, UA6225
Other flights arriving at Philadelphia PHL: AA2076, AA3247, AC8520, P8669
All flights connecting Houston IAH to Philadelphia PHL.