There are several transport options to reach the city center of Barcelona from Terminal 1 (T1) of Barcelona-El Prat Airport:

1. Aerobús (Airport Express Bus)
The Aerobús is a direct shuttle service that connects T1 with Plaça de Catalunya, in the heart of the city. Buses run every 5 to 10 minutes and the journey takes around 35 minutes. It operates every day of the year.

2. Metro (L9 Sud - Orange Line)
Metro line L9 Sud connects T1 with several points in the city, though not directly to the city center. To reach central Barcelona (e.g., Passeig de Gràcia or Plaça de Catalunya), a transfer is needed, typically at Torrassa (to L1) or Collblanc (to L5). The ride takes about 45-55 minutes.

3. Train (R2 Nord Rodalies - from Terminal 2)
There is no direct train from T1. To use the R2 Nord commuter train to reach central Barcelona (e.g., Passeig de Gràcia or Estació de Sants), you must first take a free shuttle bus from T1 to Terminal 2. Trains run every 30 minutes approximately, and the total journey (including transfer) takes about 40-50 minutes.

4. Taxi
Taxis are available outside T1 24/7. The ride to the city center takes about 25-35 minutes, depending on traffic. The average fare ranges from €30 to €40, including airport surcharge and luggage fees.

5. Ride-hailing Apps
Services like Uber, Cabify, and Bolt operate in Barcelona. Pick-up zones are usually the same as for regular taxis. Prices are similar to taxi fares but may vary depending on demand.

6. Private Transfers or Shuttles
Pre-booked private transfers are available for door-to-door service. These may be ideal for groups, business travelers, or those with a lot of luggage.

7. Car Rental
Rental car companies operate at T1 for travelers planning to drive themselves. This option is best suited for those continuing to destinations outside the city.