Motorways from Basel, Geneva, Zurich and Berne to Spiez. From here on well-built secondary roads via Interlaken to Grindelwald.
Interlaken can be easily reached by mainline trains of the world-famous Swiss railway system. Grindelwald is 35 minutes from Interlaken by Bernese Oberland Railway. Timetable SBB
There are international airports in Zurich, Geneva, Basel and Berne.