Bern Airport (BRN) : Take Motorway A6 direction Bern. Change at Wankdorf to motorway A1 direction Lausanne. At exit Forsthaus dont get off the motorway but continue direction Bethlehem and take exit Bern-Bruennen.
Zuerich Airport (ZRH) : Take motorway A1 direction Bern/Lausanne. Follow E 25 till exit Bern-Bruennen
Geneva Airport (GVA) : Take motorway A1 direction Bern. Take exit Bern-Bruennen