Even without advance planning, it's often possible to secure tickets to the Duomo complex online on the day of your visit, depending on availability. The official passes can be purchased quickly via the Opera del Duomo's booking platform, though slots for the Dome climb may sell out early. Flexibility with your schedule and openness to visiting other monuments first can help you make the most of a spontaneous trip.
Yes, online tickets, including the Brunelleschi, Giotto, or Ghiberti Passes, can often be purchased on the day if slots remain available.
If official slots are full, consider guided tours or third-party offers that include Dome entry—they can still grant access when direct booking is unavailable.