Single tickets for one-way journeys are available at all TNW ticket machines, at the BVB Customer Service Centre, at the BLT ticket counter, via the TNW Tickets app, as well as at the SBB railway station. Children between the ages of 6 and 16 and half-fare travelcard holders pay a concessionary price for single tickets. Children under the age of 6 travel free of charge. The GA (Generalabonnement – general travelcard) is valid on BVB’s entire route network throughout Switzerland. Tickets authorize one-way travel within the period indicated from the point of departure to the destination in one direction only. The validity period is always printed on the ticket.
The short-distance ticket has a validity period of 30 minutes including any changes of lines. It is valid one way only. The ticket is valid for four stops or fare points after boarding.
You can also find more information and the prices from single tickets, here.