Locarno to Brig by train

Dear Moderator

I bought a 22 days swiss pass and and I intend to take the train from Locarno to Brig via Domodossola. Will I need to book and pay some additional value?

Regards,

Márcio.

Hello Márcio,

Most trains in Switzerland don't require seat reservations, but for this trip via Italy you can best check the timetable for your specific travel date and time. Some trains do require a supplement, some may need to be booked.