Barcelona Airport City Bus
You can also choose to take a bus into the city. This is a slower yet the most economical option. It is also more crowded than the Aero Bus and makes more stops. There is not much luggage space or storage.
This is, however, a good option for budget travelers as a one way ticket is only 2.20 Euros. It runs from 5AM to 12:30AM and departs every 20 minutes.
Bus 46 leaves from both terminals (one in T1 and two in T2) and takes passengers to Placa Espanya. From here you will probably have to take the metro or alternate transport on to your final destination.
The trip takes about 45 minutes from T1 (pickup is to the left of the Aerobus stop) and 50 minutes from T2 (bus stops are outside T2b and T2C).
Night buses are labeled N17, N18 and N16. N16 departs from T2A/B/C and the other two from T1. Travel time is about 60 minutes.