If I need to build a list of itineraries within a database, but I am unsure as to the amount of actual itinerary items within the list, how do I go amonst building a table?

i.e., lets say for one itinerary there is seven stops, but another itinerary has eleven stops. They're all in the same table.

What would a database achitecture look like for a dynamic amount of stops per each itinerary?