Barcelona to Tangier

What do you what from best? What do you want to do? Do you return to Barna?
The quickest way is obviously a flight at about two hours flight time, but by the time you have schlepped out to and back from and hung around airports......

Fly. It's incredibly cheap if you plan in advance (you need to pick the right day - the discount airlines don't fly every day). But for goodness sake, if you are going to invest a few days for a side-trip to Morocco from Spain (which is a great idea), don't waste those days by going to Tangier. Go to Marrakech or Fez, and see the good stuff - not the "bordertown" experience that ferry day-trippers are subjected to. As an analogy, imagine you are from Europe, and you are going to visit the USA for the first time. Your trip takes you to, I dunno, Los Angeles or New York. You figure "as long as I'm in the USA, I'd like to carve out a few days and see a little of Mexico while I'm nearby. I think I'l fly from LA to Juarez. Or maybe Tijuana." Bad plan! With 3.5 days you could have a very nice little side trip to Fez or Marrakech and actually see Morocco - if you fly. These two cities are utterly amazing places, like stepping through a time machine and popping out in another era. Easy, cheap, and a world away from the "Tijuana"/bordertown experience you'll find in one of the ferry ports.

Davidthanks so much for your advice! I'm looking into Marrakech and Fez, but I don't know which to choose! I really want to just visit one of them and BE there instead of rushing through both. Which would you suggest, or what are the main differences?