Lisbon to Sintra by Guided TourIf you'd like a guided tour of Sintra from Lisbon, you have several to choose from. The simplest option is this Sintra Half-Day Trip from Lisbon.
You can also combine a Sintra Day Trip and Lisbon Hop-on-Hop-off Tram Sightseeing Tour.
Lisbon to Sintra by TrainThe train from Lisbon to Sintra takes about 40 minutes from Rossio station and costs about 5€ for a round trip. Buy your ticket at the station. The journey is also free with the Lisboa Card.
See also: Lisbon Train and Bus Stations