Charles Simonyi and other crew members were well and in high spirits after their three-hour return trip, said Valery Lyndin, a spokesman for the Moscow-based Mission Control.
The 14th crew of the International Space Station landed their Soyuz spacecraft on the steppes of Kazakhstan, the Russian news agency RIA Novosti reported.
Commander Michael Lopez-Alegria, who is with the U.S.-based NASA, completed five space walks, giving him 10 for his career, which is a U.S. record for space walks.
Simonyi, 58, who is Hungarian, paid nearly $25 million for the two-week space vacation. He made his fortune through his work with computer software, including helping to develop Microsoft Word and Microsoft Excel.
Interpol investigating stolen passports on missing flight
Senate Democrats to pull all-nighter on climate change