World's first space tourist spent $20 million to fly to ISS

American businessman Dennis Tito became the world's first space tourist in 2001 by paying nearly $20 million to fly to the International Space Station. For his eight-day trip to space, Dennis trained at Russia space centre Star City for a year. Notably, Japanese billionaire Yusaku Maezawa has signed up for the first private flight to the Moon with SpaceX.