Well if you are talking about the longest drivable distance of earth, you mean to say, that you are travelling from Sagres, Portugal and Khasan, Russia. So, from Western Europe country to Asian side border of Russia, the longest drivable distance between two points on Earth is the 8,726 Miles. With no ferries to bar the route and a continuous drivable route that would take some 8 days to navigate, this is the winner, and that’s your fact to drop next time you’re at the bar with friends and you need to flex your brain muscle a little bit.