UA3991 United Airlines - Flight Status

Which is the frequency of flight UA3991?
The flight UA3991 is scheduled to flight on Friday, Saturday on a weekly basis.

Which is the distance of flight UA3991?
The distance between the two airports is 1324 miles.

Which is the flight time of flight UA3991?
The scheduled flight time gate to gate is: 03:38 hours.
The real flight time gate to gate on average is: 03:19 hours.

Are the departure airport and arrival airport at the same Time Zone?
No, each airport is in a different timezone. The times shown above, are presented in the local time of each respective airport.
Current Time in Houston: 2026-07-15 08:14:14
Current Time in Philadelphia: 2026-07-15 09:14:14

The following airlines serves the same route between Houston and Philadelphia:

American Airlines
- Flight Number: AA1925. (On Time performance: 75 - Average Delay: 13 minutes)
- Flight Number: AA1927. (On Time performance: 55 - Average Delay: 28 minutes)
- Flight Number: AA2561. (On Time performance: 73 - Average Delay: 59 minutes)

United Airlines
- Flight Number: UA1663. (On Time performance: 71 - Average Delay: 23 minutes)
- Flight Number: UA2631. (On Time performance: 86 - Average Delay: 0 minutes)
- Flight Number: UA2642. (On Time performance: 100 - Average Delay: 1 minutes)
- Flight Number: UA2748. (On Time performance: 56 - Average Delay: 51 minutes)

We have gathered data from recent months and present below an analysis of how timely the flights have been.

Delays analyzed by Weekday: We have gathered available data from last six months, spanning from May 22, 2026 to July 03, 2026. Next, you can observe the results broken down by day of the week: number of flights analyzed, on-time performance per day, and average delay per day.

Delays analyzed by Month: We have gathered available data from last twelve closed months, spanning from May 22, 2026 to June 27, 2026. Next, you can observe the results broken down by month: number of flights analyzed, on-time performance per month, and average delay per month.

Note: We have excluded some months from the graph, since the quantity and quality of the data is not representative enough.