There are two travel options between Kandersteg and Iselle depending on the season.
Seasonal direct connection
The trains run from 01.04. to 14.10.2023.
You can find the connections in the online-timetable.
You need a reservation in the ticket store. In the ticket store first determine
1️⃣ the vehicle category,
2️⃣ then the route.
3️⃣ before selecting the date:
Connection with change
You use the car transport at the Lötschberg and Simplon. The stretch in between you drive yourself by car. It takes about 45 minutes. You can find the connections in the timetable of the car transport.