No, the standard Viva Viagem card is generally not accepted on the local buses in Sintra, which are operated by the company Scotturb. While the Viva Viagem card is the primary electronic ticket for the Lisbon Metropolitan Area—covering the Lisbon Metro, Carris buses, ferries, and the CP urban trains that run to Sintra—the buses that circulate within the hills of Sintra (such as the 434 and 435 tourist circuits) require their own specific tickets. Visitors to Sintra must typically purchase a separate "Sintra Green Card" or individual Scotturb tickets from the driver or local kiosks. However, if you have a Lisboa Card, it often includes the train fare to Sintra but still requires separate payment for the local bus loops. For the most seamless experience in 2026, it is recommended to use the "Zapping" mode on a Viva Viagem card for the train ride, then pay for a Scotturb day pass upon arrival at the Sintra station.