Jun 19, 2016 - 6:47 PM
Thanks for joining MySwissAlps! The quickest and easiest route will be displayed by default if you consult the timetable and enter Varenna-Esino as your destination. It indeed runs via Brig, Domodossola and Milan.
The Swiss Travel Pass coverage can be checked by downloading the validity map and zooming in on the route you have in mind. As you'll see, Zermatt-Brig and Brig-Domodossola are covered. From Domodossola onward, you need an additional full fare ticket to Varenna. Information on train tickets to Italy can be found here.
There is an alternative, that's very scenic and will result in less additional travel costs as the remaining Italian leg is shorter and cheaper. However, it's quite long and complicated as well: Zermatt-Brig-Domodossola-Locarno (using the beautiful local Centovalli train)-Chiasso-Como-Varenna. Entering 'Locarno' as a via-station in the timetable allows you to find details on these connections. The entire leg as far as Chiasso would be covered by the Swiss Travel Pass, so in that case you'd only need an additional ticket Chiasso-Varenna.