The Space Launch System is to be a Shuttle-Derived heavy launch vehicle. The initial capability of the core elements, without an upper stage, should be for between 70 tons and 100 tons into low-Earth orbit (LEO) in preparation for transit for missions beyond low-Earth orbit. With the addition of integrated upper Earth Departure Stage the total lift capability of the Space Launch System should be 130 tons or more.

The first flight - SLS-1 - Is targeted for 2017.