Walking

By staying at a carefully selected and strategically located hotels you can take full advantage of the city's layout by walking to most of your destinations.
Barcelona is an excellent walking city, replete with plazas and pedestrian-friendly avenues woven into the structure of the city grid. Most visitors want to take time to absorb the architectural landmarks that adorn different neighborhoods and the only way to truly accomplish that is on foot.

Metro (Subway)

When you have to be there in a hurry the metro is your best bet. The Barcelona subway is the easiest and fastest way of moving around Barcelona. Two separate companies operate subway lines in the city-- Transports Metropolitans de Barcelona (TMB) and Ferrocarrils de la Generalitat de Catalunya (FGC).

The TMB trains run from 5:00 AM until midnight Monday through Thursday and Sunday. On Friday, Saturday and holiday evenings the trains run until 2:00 AM.
FGC trains run from 5:45 AM until 12:05 AM Monday through Thursday. On Friday and Saturday the trains run from 5:50 AM until 2:15 AM. On Sunday the trains run from 5:50 AM until 12:02 AM.

Train

Regional rail services leave Barcelona for destinations through the Catalan region of Spain and elsewhere throughout the country.

Bus

Each bus running a specific route has its own starting and stopping time but in general buses run from 6:05 AM to 10:35 PM seven days a week..

Special night buses, requiring a special ticket, run from 11:00 PM to 4:00 AM.
You can also take the bus for trips to destinations in other parts of Spain.

You can save money by purchasing multi-ride tickets and passes such as a special pass that is good for travel on either the metro or the bus and can also be used for trips to and from the airport.

Taxi

Taxis can be booked in advance but if you need to flag one, look for a green light indicating the taxi is available. Official taxis are black and yellow.

Rental Car

Think twice before renting a car if you don't have experience driving in European cities. The streets can be complicated and confusing. And who wants to spend vacation being tense and frustrated? If driving wasn't challenging enough, parking may present it's own set of problems. You may have trouble finding a convenient parking space and parking illegally can result in your vehicle being towed.
But if you insist upon driving in the city or you plan to spend time traveling the countryside, you will find several of the major international rental agencies present along with European rental outfits at the airport and the railway station as well as several other locations throughout the city.

Drivers must be at least 21 years old and show a passport and a valid driving licence. If your credit card company doesn't provide international insurance coverage, you'll have to purchase a policy before renting.