Astronomers use another measurement tool for calculating distance in the Solar System called âastronomical unitsâ. 1 astronomical unit is the average distance from the Earth to the Sun; approximately 150 million km. At its closest point, Saturn is 9 AU, and then at its most distant point, itâs 10.1 AU.y Fraser Cain on November 9, 2009. Saturnâs distance from the Sun is 1.4 billion km. The exact number for Saturnâs average distance from the Sun is 1,433,449,370 km.