Yes, in 2026, Milan uses an integrated ticketing system operated by ATM (Azienda Trasporti Milanesi). A standard single ticket (currently €2.20 for Mi1-Mi3 zones) is valid for 90 minutes from the first validation. During those 90 minutes, you can switch as many times as you like between trams, buses, and the metro. However, there is one important "catch": while you can change between different metro lines without exiting the turnstiles, you cannot "exit and re-enter" the metro system using the same single ticket. Once you leave the metro station, your ticket is still valid for trams and buses until the 90-minute window expires, but it will not open the metro barriers again. For 2026 tourists, the "high-value" move is to use contactless payment (bank card or phone) directly at the barriers; the system automatically calculates the best fare for you throughout the day.