Varenna train station

Varenna Esino <–> Milan Central Station
Varenna Esino <–> Tirano

To reach the Varenna train station from Bellagio you can take the ferry to Varenna and from the public pier you can reach the train station in 10/15 minutes walking

From Varenna you can easily reach the Milan Central station.
From Milan Central you can then reach the Malpensa airport with the “Malpensa Express”
From Milan Central it’s possible to reach the Linate airport with the shuttle bus service.

You can also reach the Bergamo Orio Al Serio airport