Right in front of the train station, in the Urban Center building, there is a left luggage service. There you can leave your luggage and claim it 24/7
Inside the Adalberto tower.
During summer 8:30 - 19:00
During winter 8:30 - 17:30
In Airport (Bergamo - Orio al Serio):
The left luggage is run by Autostradale it is close to the parking cash at the Terminal parking entrance. It works every day: you can leave your luggage from 8 to 7pm and you can claim your luggage from 8am to midnight.
Further details: www.orioaeroporto.it