The RER B train links the airport to the city centre and a one-way ticket can be purchased for 10.30 € (NZ$ 17) approx. The train from the airport travels along the blue metro line and connects to major stations which include Châtelet Les Halles and Gare du Nord. Once your flight lands follow the signs to Gare SNCF which is the RER B train station located within Terminal 2 of the airport.