Europa is one of Jupiter's four large moons, and its distance from the sun is always the same as Jupiter's, plus or minus the radius of Europa's orbit. Depending upon its position in orbit, Europa is 779.4 million to 780.6 million kilometers from the sun.
To compute these distances, according to Space.com, it is necessary to know Jupiter's distance and Europa's orbit. According to Space.com, Jupiter orbits the sun at a distance of 780 million kilometers. Europa is Jupiter's sixth moon and orbits the planet with a mean orbital radius of 670,900 kilometers. Therefore, when Europa is between Jupiter and the sun, its distance is 779.4 million kilometers. When the moon swings around to Jupiter's far side, its distance from the sun is 780.6 million kilometers.