In 2026, the Lisbon Card (Lisboa Card) provides two major benefits for a day trip to Sintra: free train travel and admission discounts. Specifically, it covers the round-trip fare on the CP (Comboios de Portugal) trains from Lisbon’s Rossio or Cais do Sodré stations to Sintra. Once you arrive, the card grants you free entry to the Sintra National Palace and the National Palace of Queluz. For the most famous sites like Pena Palace, the Castle of the Moors, and Quinta da Regaleira, the card does not provide free entry but offers a 10% to 15% discount on the ticket price. It is important to note that the card does not cover the local "Scotturb" tourist buses in Sintra (like the 434 loop), so you will still need to pay for those separately or walk to the attractions, which can be quite steep.