Cheapest ticket option from Interlaken to Paris (2 adults and 1 child)

Hi,

What kind of travel card or ticket type offers the cheapest ticket option for 2 adults and 1 child from Interlaken to Paris?

Thanks.

Hello RTTK

For advice on an international booking, please contact the Contact Center on +41 848 44 66 88 (CHF 0.08/min.) or visit www.sbb.ch.

Have a nice day.

Kind regards, VlaznimA.