From Milano Malpensa: The MALPENSA EXPRESS airport service connects the center of Milan to Malpensa Airport and vice versa, with a train every 15 minutes, 7 days a week.
From Milano Bergamo: There are several bus companies that reach Milano Central Station in 60 min
From Central Station: take the metro green line M2 to Loreto stop and from Loreto take the red line M1 to Pasteur, the hostel is in Viale Monza, a few steps from the metro stop.