Since the Earth and Jupiter are both revolving around the sun, the distance between them is always changing. The average distance between the Earth and Jupiter is 483 million miles. If you could travel at the speed of light, it would only take you 43 minutes to get to Jupiter. Since people cant travel at the speed of light, you would probably have to take a rocket ship to Jupiter instead- which would take you about 2.2 years if it was going at top speed the whole way. If the California interstate went all the way to Jupiter and you could drive there going 65 mph, it would take you almost 850 years!

That depends on the speed. Light can do it in under an hour. The Voyager probes took three years.

That depends on how fast you're going. We have sent several probes (Pioneer, Voyager 1, and Voyager 2) past Jupiter, and they took 3-5 years to get there. If you can imagine being cramped up in a car for a 3 year road trip, you can see why we won't be sending people to Jupiter any time soon!