I'm going to visit Ibiza (spain) in October and my return flight is from Barcelona. I'm wondering is there cheaper way to get to Barcelona than on the airplane?
You can look at Direct Ferries to book your travel to Ibiza by sea. And if there is a Ferry you can probably rent a private boat too but you'll have to look for it.
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3Here is a direct link to the relevant page on Direct Ferries: directferries.com/barcelona_ibiza_ferry.htm – skifans Aug 29 '16 at 22:07