Me 4 minutes. Its 0.54 miles. I find this an acceptable distance because:
a) The road is slow and dangerously potholed.
b) I can go from BRAKES ON to my car in 20 minutes usually. The extra time here is because I usually have to pull a B350 out of the hangar to put the 200 away, then put the 350 back in there.
I'm not sure where the rest of the original post is going but the longest sector I do is around 2 hours. Shortest to date, in the current job, is about 25 minutes - enough time to get up to A150, get over some pretty big hills and come down again, about 75NM away.
Aside from the point-to-point stuff, most of my operations are within 100 feet vertically and horizontally of various lumps of terrain. And I can be in that situation for anything up to 2 hours at a time.
Still, I suppose someone has to do it!