The best way to get to Switzerland from Milan

Milan is 1 to 2 hours’ drive from Lugano, Switzerland (the southernmost city), which is very close

If you want to go to a city in the north or east, taking a train is the best option. A good choice, you can check all train timetables and routes on the SBB official website http://www.sbb.ch/en/home.html

Because it is sometimes not clear online , so you can go directly to the train station in Milan to ask, which is more convenient

I hope I can help you. If you have any questions, you can always come to me:)