Just to be clear, since many here are not pilots. There is no requirement to file a flight plan for a VFR (Visual Flight Rules) flight in the U.S. That doesn't mean some sort of flight plan isn't a good idea. For example, I typically make sure Sue knows where I am going and all the rest of the usual details, but don't file with the FAA. She knows what to do if I don't call by the appropriate time.

But, again, no legal requirement involved, at least in the U.S. I cannot speak to other country's regulations.