From Interlaken West train to Spiez, train to Domodossola, then train to Locarno S. Antonio. 4 h 38 min SFr 62. From Interlaken Ost train to Luzern then train to Locarno. 4 h 46 min SFr 136. From Interlaken drive to Locarno. 2 h 44 min SFr 35.
Train from Interlaken to Locarno
Swiss Railways (SBB/CFF/FFS) operates a train from Interlaken to Locarno hourly. Tickets cost $12 - $23 and the journey takes 16 min. 4 other operators also service this route.