Soyuz MS-20 was a Russian Soyuz spaceflight to the International Space Station (ISS) on 8–20 December 2021. Unlike previous Soyuz flights to the ISS, Soyuz MS-20 did not deliver any crew members for an ISS Expedition or serve as a lifeboat for any crew members on board the station. Instead, it was commanded by a single professional cosmonaut. It carried two space tourists represented by company Space Adventures, which had executed eight space tourism missions to the ISS between 2001 and 2009. The flight to reach the ISS took six hours.