If you wish to transfer from Barcelona Airport to the city centre during the night you can catch one of the night buses N17 (T1) N18 (T1, T2A, T2B, and T2C). There is also a supporting bus service N18 which has stops at both T1 and T2A, T2B and T2C.

Getting from Barcelona-El Prat (BCN) to the city center late at night requires a bit of planning, as the standard R2 Nord train and the Metro (L9) typically stop running around midnight (except on Fridays until 2 AM and Saturdays all night). If you land after midnight on a weekday, your best public transport option is the NitBus (Night Bus). Lines N17 (from T1) and N16 (from T2) run every 20 minutes throughout the night and head directly to Plaça de Catalunya; the ride costs about €2.55, or you can use a T-casual card. Alternatively, the Aerobús operates 24/7, with slightly less frequent service (every 20-30 minutes) between 1 AM and 5 AM, costing €6.75 one way. For maximum convenience, official taxis are available 24/7 at the ranks outside each terminal. A taxi to the city center usually takes about 20–30 minutes and costs between €35 and €45, which includes the mandatory airport supplement and a late-night surcharge. Rideshare apps like Cabify and Uber also operate, but they must be booked in advance and often have specific pickup points away from the main taxi ranks.