This question has many answers, since Jupiter is never at a constant distance from Earth. At it's closest it is approximately 629,000,000 Km from Earth.
If we take 629,000,000 km and divide it by 14 km/s we will get the approximate time, in seconds, it would take a spaceship to travel from Earth to Jupiter when Jupiter is closest to earth.
So: 629,000,000km/14(km/s) = 44928571.43 s
44928571.43 s = 748809.5238 min = 12480.15873 hours = 520.0066138 days
How long a spaceship traveling at a steady speed of 14km/s to reach Jupiter?
1 answer