I don't think you can, not from a real vacation to another real vacation, like France to Egypt. Last time I came home from France and tried to go straight back (my 3 day limit had run out with no visa points yet), it said I was "still recovering from my last vacation" - like people "recover" from something fun!
I wasn't treating the future as a vacation, but I guess the game coding does, it's a "different world". Although I'm not sure what's so special about the default world which lets you travel from it to anywhere, but not from an anywhere to an anywhere else.
I couldn't do A-B-C-B-A. I went from normal to future to France, then my holiday expired and it sent me back to normal, not future, without asking me. Travelling to the future and back sorted it, as though the game had forgotten to do something because of me missing a stage out. Not sure why, since what was missing was my body, which is the same in all three worlds, same clothes too.