The two options solve different problems. Aerobús is the direct choice for Plaça Catalunya and Plaça Espanya, while L9 Sud works better when your destination fits the metro network and you are happy to make a transfer. In 2026 Aerobús lists €7.75 one-way, while the dedicated metro Airport Ticket costs €5.90.
The short answer
OptionBest for2026 fareMain trade-offAerobúsPlaça Catalunya, Plaça Espanya, heavy luggage€7.75 one-wayRoad traffic; higher fareL9 SudHotels near L1/L3/L5/L10 connections or Fira€5.90 Airport TicketNo direct service to the main tourist squares
Aerobús: simplest for central Barcelona
The official Aerobús operates 24 hours a day, 365 days a year, with A1 serving Terminal 1 and A2 serving Terminal 2. At our check, the operator lists €7.75 one-way and €13.30 return. For a visitor staying around Plaça Catalunya, Universitat or Plaça Espanya, it is usually the easiest route: board outside the terminal and reach a central stop without having to understand the metro ticket system or make a compulsory transfer.
It costs only €1.85 more than a single airport-metro ticket. With a suitcase, children or a late arrival, avoiding an extra interchange can easily be worth more than that difference.
L9 Sud: useful, but not a direct metro to Plaça Catalunya
L9 Sud serves both T1 and T2. TMB publishes a basic frequency of around seven minutes and approximately 32 minutes for the full airport-to-Zona Universitària section. The crucial detail is the route: L9 Sud does not run through Plaça Catalunya, Passeig de Gràcia or Sagrada Família. Many central journeys require a change.
Useful interchanges include Torrassa for L1, Collblanc for L5 and Zona Universitària for L3; the line also serves the Fira area. That makes the metro excellent for some hotels and distinctly less convenient for someone simply trying to reach the historic centre.
Useful rule: if the map shows one easy interchange and a short walk to your hotel, L9 Sud is sensible. If it shows two changes, stairs and a long walk with luggage, Aerobús is probably the more human choice.
The airport-metro ticket trap
For 2026 TMB lists €5.90 for the Airport Ticket. It is a special, non-integrated ticket for journeys through Aeroport T1 or Aeroport T2 on L9 Sud. The popular one-zone T-casual costs €13 for ten journeys, but it is not valid to enter or exit through the L9 Sud airport stations. The ordinary single ticket and T-grup are also excluded.
Some passes do include airport metro travel, including T-usual and Hola Barcelona. If you were going to buy a qualifying pass for your stay anyway, the simple €7.75-versus-€5.90 comparison no longer applies because the airport ride may already be included.
Which is faster?
There is no honest single “airport to centre” time. TMB publishes about 32 minutes for L9 Sud to Zona Universitària, after which many central addresses require another line. Aerobús runs by road to central stops, so its real journey time is more traffic-sensitive. Compare terminal to hotel door, including waiting, interchanges and walking, rather than comparing two headline numbers that end at different places.
T1 versus T2
Both options serve both terminals: Aerobús uses A1 and A2, while L9 Sud has Aeroport T1 and Aeroport T2 stations. If you do end up at the wrong terminal for another reason, Aena operates a free 24-hour inter-terminal shuttle. That adds time, however, so it is not a reason to deliberately use the wrong stop.
Choose in 30 seconds
- Hotel around Plaça Catalunya/Universitat: start with Aerobús.
- Hotel around Plaça Espanya: Aerobús is particularly convenient.
- Hotel near Fira, L1, L3 or L5: check L9 Sud with one interchange.
- You already have T-usual/Hola Barcelona: check whether airport metro travel is included before buying another ticket.
- Heavy luggage: minimise interchanges, not just ticket price.
Verdict
For a typical first-time visitor staying centrally, Aerobús is the simpler default; L9 Sud wins when its interchange pattern fits your actual district or you already hold an airport-inclusive pass. The single-fare difference is small compared with the cost in effort of an awkward extra transfer.
Sources checked 10 September 2026: official Aerobús and TMB fare, L9 Sud and ticket-validity pages; Aena for the terminal shuttle. Recheck live service notices on your travel day.
