Took the Aeroport bus to Plaza De Catalunya .. it was inexpensive, efficient and easy! I booked a hotel (Hotel Jazz) right near there so it was just a 2 block walk to the hotel once I got off the bus. I stayed in Barcelona for 2 nights prior to my cruise. Cruise morning I took a taxi to the port. Also simple, and not expensive. Departing the ship, I got off super early - booked my transport from the ship to the airport - and hopped a flight to Paris. Since I was flying within Europe I felt safe taking an 11am flight.... I think if I was traveling back home to the US I would have booked a later flight - like Noon or 1pm. Also.. little tip. Runner Bean Tours offers free walking tours in Barcelona. I did 2 different tours with them. I highly recommend them!