Range of a system depends on it's design, topography around the radio system, and topography around the listener. There is no one answer.
Radio systems are usually designed and licensed to cover a specific area. That's often showed as Kilometers around a center point/transmitter site. Agencies that build out these systems are trying to provide the best coverage they can within the agencies jurisdiction. Coverage costs money, so there's no need to try to expand coverage far beyond that.
For the listener, it'll depend entirely on their location, their antenna, antenna height and a few thousand other variables.