http://www.sarfa.com/paginas/aerobus_tcc.php
The A1 Aerobus (Airport Bus) is a fast, cheap and simple way of getting from Barcelona airport to Plaza Catalunya in the center of Barcelona. 

Click here for link to Barcelonabus.com - buses to Girona and Reus Airport.
Click here to open an article about how to get to Barcelona airport


How long does the bus trip take?
The journey takes about 30 minutes, but it is a good idea to add 15-30 minutes as traffic conditions can vary. Another good tip is that most people board this bus at Plaza Catalunya and the bus can be very full during peak season, so if you are boarding on a stop nearer the airport a good tip is to be a little early to allow for missing a bus that is full.

Aiport bus ticket price:
€ 3.75 for a one way ticket
€ 6.45 for a return ticket

You can buy your tickets on the bus using cash or credit cards.

Airport bus departure times from Plaza Catalunya.

First departure from pl. Catalunya: mon-sat, sun/bank holidays: 05.30
Last departure from pl. Catalunya: Mon-Fri: mon-sat, sun/bank holidays: 00.15

Airport bus departure times from Barcelona Airport:

First departure from Barcelona airport: Mon-Sat, sun/bank holidays: 06.00
Last departure from Barcelona airport:: Mon-Sun/holidays: 01.00 h.

Timetable frequency: 

Depending on the time of day, the Aerobus airport buses has a departure time from every 6 minutes to maximum every 15 minutes.

Aiport bus stops from Plaza Cataluyna to Barcelona Airport

Please note that the stops are not the same for the journey from the airport as too the airport.

-Plaza Catalunya (in front of the department store El Corte Inglés) 
-Corner of street "Passeig de Gràcia" and street "Diputació"
-Corner of street "Avenida Roma" and "Comte d'Urgell" 
-Estació de Sants  (Sants station)
-Plaza Espanya by street "Creu Coberta" opposite side of Venetian towers
-Airport (Terminal A)
-Airport (Terminal B)
-Airport (Terminal C)

Click here to find out which terminal in Barcelona airport your flight is arriving or leaving at.

Stops from Barcelona airport to the centre of Barcelona, Plaza Catalunya

-Airport (Terminal A)
-Airport (Terminal B)
-Airport (Terminal C)
-Plaza Espanya (by the Venetian towers)
-Corner of street "Gran Via de les Corts Catalanes" and "Calle Comte d'Urgell"
-Plaza de la Universitat
-Plaza de Catalunya