The longest road in the world to walk, is from Cape Town (South Africa) to Magadan (Russia).
No need for planes or boats, there are bridges.
It’s a 22,387 Kilometers and it takes 4,492 hours to travel.
It would be 187 days walking nonstop, or 561 days walking 8 hours a day. Along the route, you pass through 17 countries, six time zones and all seasons of the year.