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This is a complex question and depends greatly on where in their orbits the planets are when you start. We can take one of the planned trips to Mars from Earth as an example. Ten months to travel to Mars. The distance from Jupiter to Saturn is always much greater and at the very least seven times the Earth - Mars distance. So with known technology at best it would take about five earth years to cross the distance from Jupiter to Saturn. It could be that a different amount of "gravitational slingshot" effect could be used and the distance covered in less time (if you are not going to stop at Saturn then it will be quicker to get there too!)

The Voyager 1 spacecraft came closest to Jupiter in March of 1979 and closest to Saturn in November of 1980 - 21 months for that part of it's trip.

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15y ago

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