The disclosure provides a system and method of delivering packages. The system may include a plurality of land vehicles that transport a plurality of unmanned aerial vehicles (UAVs) to locations within a distance of delivery destinations. The system may determine, based on a number of packages to be delivered to destinations in a geographical area, a number of land vehicles to carry the packages to within a UAV round-trip range of each of the destinations. The system may allocate the number of packages to the number of land vehicles. The system may determine a route for each land vehicle that brings the land vehicle within the UAV round-trip range of each destination. The system may dispatch the UAVs carrying the packages from the land vehicle at dispatch locations along the respective route.