I do not have business or network analyst. I was able to do less than 6 hours in AGO, but it won't do 6 hours which is what I was asked to do.
Hi Sharon,
Unfortunately a maximum of 5 hours is set for drive time polygons in ArcGIS Online, and that limitation is documented here:
Create Drive-Time Areas—ArcGIS Online Help | ArcGIS
In this particular case, Network Analyst may be the only viable alternative to obtaining a drive time polygon that covers more than 5 hours of travel..