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Might want to talk to a travel agent, celebrity has cruises that includes tip , liquor, tax etc . We did a 12 day cruise out of Barcelona with 5 stops in Italy and several other countries. Barcelona is a great port to start or end your cruise , most Mediterranean cruises are very port intensive with very few sea days , our cruise was on rccl . I would definitely spend a couple of nights in Barcelona if that’s you embark. Celebrity and rccl can plan your round trip airfare also . Good luck.