By train:

The Bergen Railway is the most beautiful train journey in the world, reports the well-known travel guide Lonely Planet according to the press agency, NPK and the national newspaper; Aftenposten.
You can travel comfortably and efficiently to Geilo on the Bergen Railway: approximately 3 hours from Bergen and 3½ hours from Oslo. The train has 5-6 arrivals/departures to/from Geilo each day.
NSB - Norwegian State Railway

By bus:

Call: 177 for bus information.

To/from Gardermoen Airport - Geilo.

Online booking bus Gardermoen Airport

To/from Torp Sandefjord Airport - Geilo.

Online booking from Torp to Geilo.

Gardermoen - 269 km

Oslo - 248 km

Bergen - 250 km