The cost of a metro ticket in São Paulo can vary depending on the distance traveled and the type of ticket you purchase. The fare for a single trip on the São Paulo metro system ranges from approximately R$4.40 to R$6.50. The fare is calculated based on the number of fare zones crossed during the journey.
Additionally, the city offers rechargeable smart cards called Bilhete Único, which provide fare integration between the metro, buses, and trains, offering potential discounts on multiple trips within a certain timeframe. It's recommended to check for any updates on fares and ticketing options as they may change over time.