By car: take the A13 to Thusis, then drive over the Julier Pass in the general direction of St. Moritz. You can load your car onto the Vereina train in winter if you don't feel like driving over the mountains. By train: Take the SBB train to Chur, and then the narrow gauge railway (Rhätische Bahn) to St. Moritz. From there you can take a bus to Sils. There are international airports in Basel (4 hrs) and Zurich (3 hrs.).