From the airport how long does the airport bus take and which bus ?
Not long at all, maybe 20 mins and a lot cheaper than the hotel offering of the meet and greet service to just jump into a taxi outside.
it is less than 20 min ,very comfartable because you have special bagage space, phone chargers.
only one company operates from airport to Barcelona center ( placa de catalanya) . Aerobus costs 5,9 Euro and takes 3 stops with last one placa de catalanya. It is about 400-500 meters to the Hotel El Avenida
Get an answer from Hotel El Avenida Palace staff and past guests.