The VMS Eve mothership releases the VSS Unity spacecraft after ca. 48 minutes. The total duration is approximately 2 hours. As a result, the ascent time + the descent time that the Virgin Galactic's spacecraft takes is about 72 minutes, but I wonder what the breakdown between the ascent time and the descent time is.
This paper Biomedical monitoring of spaceflight participants during suborbital flights via agile architecture gives the following figure, showing four minutes of free fall.
The paper states that the powered flight portion lasts 70 seconds.
The paper goes on to say
the glide phase will begin with a return to an unpowered horizontal runway landing that will occur after a glide of 25 min. Total flight duration will be 150 min.
Perhaps they stretch out the flight to the drop altitude to last longer than an hour? Otherwise these numbers don't seem to add up.