How much will SLS and Orion cost to fly? Finally some answers " “My top number for Orion, SLS, and the ground systems that support it is $2 billion or less,” Hill told Ars. “I mean that’s my real ultimate goal. We were running at about three-plus, 3.6 billion [dollars] during the latter days of space shuttle. Of course, there again, we were flying six or seven missions. I think we’re actually going to have to get to less than that.” Ars has learned that the agency’s ultimate goal for annual production and operations costs is about $1.5 billion. "