You can check rates and maps at:

• Barcelona metro service Transports Metropolitans de Barcelona
• Tram to Barcelona TRAM
• Train from Barcelona to cities on the Ferrocarrils de la Generalitat de Catalunya suburban line
• Train from Barcelona to the metropolitan area and cities on the Rodalies de Catalunya suburb
• Bicing bicycle rental service

There are several options for going to the airport:

• If you want to use the metro, you have to take line 9 South and buy a one-way ticket (€ 4.60). The T-casual or single subway ticket is not valid for going from home to the airport. This line can take you to both Terminal 1 and Terminal 2.
• If you want to take the train (RENFE), you can buy a ticket in Rodalies de Catalunya. The airport line is R2 North and the train will take you to Terminal 2. In case you need to catch a plane leaving Terminal 1, there is a bus connection that connects both terminals at no extra cost.
• If you prefer to go by bus, you can use the normal T-10 and go with line 46 or the Aerobus (in this case you have to buy a different ticket).
• If you need more information to make this journey, you can consult this website.