Whats the distance between Echuca and Mildura?

Assuming you meant

• the group of objects: Echuca, the town located on the banks of the Murray River in Victoria, Australia and Mildura, the regional city in northwestern Victoria, Australia, part of the Rural City of Mildura

Did you mean?

• the group of objects: Echuca, the town located on the banks of the Murray River and Campaspe river in Victoria, Australia and Mildura, the regional city in northwestern Victoria, Australia, part of the Rural City of Mildura
• the group of objects: Echuca, the town located on the banks of the Murray River in Victoria, Australia and Mildura Shire, the Australian local government area in Victoria
• the group of objects: Echuca, the place in Lima, Peru and Mildura, the regional city in northwestern Victoria, Australia, part of the Rural City of Mildura
• the group of objects: Echuca, the town located on the banks of the Murray River and Campaspe river in Victoria, Australia and Mildura Shire, the Australian local government area in Victoria
• the group of objects: Echuca, the place in Lima, Peru and Mildura Shire, the Australian local government area in Victoria