Jupiter’s average distance from the Sun is about 5.2 AU. An astronomical unit is the average Earth–Sun distance, so Jupiter orbits roughly 5.2 times farther from the Sun than Earth does.
That figure describes Jupiter’s semimajor axis, or the midpoint of its slightly oval orbit. In kilometres, the average distance is approximately 778 million km. Jupiter completes one trip around the Sun in about 11.86 Earth years.
Jupiter is not always exactly 5.2 AU away. Its orbit carries it from roughly 4.95 AU at perihelion to about 5.46 AU at aphelion. Because the orbit is only mildly eccentric, 5.2 AU is a useful and widely accepted rounded value.
A common mix-up is confusing distance from the Sun with distance from Earth. Jupiter’s Earth distance changes considerably as both planets move, while 5.2 AU refers to Jupiter’s orbital distance from the Sun.