BY TRAIN: Nearby Lecco is connected directly by rail to Milan. From Lecco you can reach Barzio by bus.
BY PLANE: Bergamo is the closest airport to the festival. From the airport you can reach Bergamo by bus, followed by a train to Lecco, and then another bus to Barzio. It is also fairly easy to reach Barzio (via Lecco) from Milan's other airports.