90 minutes is a low earth orbit period.
A suborbital craft won’t be travelling at that speed.
Unless a suborbital trip is nearly at orbital velocity, it will involve a high, arcing trajectory. This will make the deceleration at the end unacceptably (lethally) high for all but short arcs. Some of the Mercury suborbital missions involved deceleration of 15 gees, if I recall correctly.
Like, you could do a partial orbit & then drop down over the destination. But it would need much more delta-v & an orbital class heat shield.
It was proposed as nuclear warhead delivery method though: https://en.wikipedia.org/wiki/Fractional_Orbital_Bombardment...