[5][6] He landed safely in Kazakhstan, on 3 October 2019 aboard Soyuz MS-12 completing the United Arab Emirates first astronaut mission.

He also received training in Houston in Texas, and Cologne in Germany, as part of partnership agreements with major space agencies, including NASA, ESA, and JAXA.

[14] Al Mansoori was assigned to Soyuz MS-15, alongside Russian commander Oleg Skripochka and American flight engineer Jessica Meir, both of whom would remain aboard the ISS for 204 days as part of Expedition 61/62.

[15] Unlike Skripochka and Meir, Al Mansoori would land eight days after launch aboard Soyuz MS-12, alongside Russian commander Aleksey Ovchinin and American flight engineer Nick Hague, who would be returning following a 203-day stay on the ISS as part of Expedition 59/60.

Al Mansoori, Skripocka and Meir launched on 25 September 2019 from the Baikonur Cosmodrome; the trio spent under six hours free flying in space before docking to the Zvezda module on the ISS.

[16] Following docking the hatches between Soyuz MS-15 and Zvezda were opened, allowing Al Mansoori, Skripochka and Meir to travel inside and meet their six crew mates.

[17] During his short stay aboard the ISS, Al Mansoori conducted 15 experiments created by UAE school students and selected under an MBRSC "Science in space" competition,[18][19] conducted Earth observation experiments, filmed the first ever tour of the ISS in Arabic and became the first Middle eastern person to be studied following time in microgravity.

[citation needed] He trained in the Neutral Buoyancy Laboratory (NBL), passed evaluations which included using the Extravehicular Mobility Unit (EMU), maintenance of the International Space Station, the Incapacitated Crew Rescue (ICR), and completed theoretical and practical training sessions on the T-38 jet.

[23][24] NASA has updated the terminology post the return of the mission to Earth on 3 October 2019, and referred to Hazzaa as a visiting astronaut.