We tried to book one way to tangier from Barcelona but could not. We plan to take ferry back to Spain and continue tour to Granada. Has anyone had this issue? Or better know way around it? Thank you.
No, this problem does not sound familiar. Which airline? Was it an issue of credit card approval?
Spare yourself going to Tangiers. There are great places to see in Morocco like Rabat, Fez and Marrakesh, but Tangier is not one of them. It is a place to avoid.
Tangier is not a popular destination for a number of people on this forum.
To find out why, search on Tangier using the Search window at the top of this window.
(But we will permit you to go if you really want to, despite the warnings. :-)