Hello Hoovoiwoa86 ,
Thank you for your request.
Various construction works are planned this summer on the route from Spiez to Milan. At the moment, ticket sales via the Simplon are blocked.
I recommend you travel via Zürich to avoid the replacement buses.
Please contact my colleagues for more information. You can call our SBB Contact Center on 0848 44 66 88 (CHF 0.08/min) or +41 51 225 78 56 (free from abroad).
I wish you a nice evening,
LoredanaD