This hotel is about 30 minutes from the airport. From the airport out the front follow signs to the train. By a T10 (which allows 10 trips and can be used by multiple people - just let the person with you in your group who is behind you take the ticket out after you and reuse it. This is legal in Barcelona). T10 is 10.20 Euros I think for 10 trips on the underground or train. Get off at Passeig de Grasia and walk one block to the street and it's just around the corner. Great location! About 15 minute walk to the main square and about 20 to the Ramblas. Has a great roof terrace with a small pool (like a massive bath).
Get an answer from Hotel HCC Regente staff and past guests.