NASA astronaut Sunita Williams retired from the US space agency at the end of December 2025, concluding a 27-year career marked by record-setting missions aboard the International Space Station. NASA confirmed the development on January 20, 2026. Williams, currently visiting India, interacted with students at the American Center, reflecting on her long-duration missions, leadership roles, and contributions to future Moon and Mars exploration.

BulletsIn

• Williams completed three ISS missions, serving as flight engineer, expedition member, and station commander, contributing significantly to scientific research, engineering operations, and long-duration human spaceflight objectives.
• NASA said her retirement became effective December 27, 2025, ending a distinguished career that shaped commercial spaceflight readiness and strengthened operational experience in low Earth orbit missions.
• She logged 608 days in space, ranking second among NASA astronauts in cumulative time, and is tied for sixth-longest single American spaceflight with Butch Wilmore at 286 days.
• Williams completed nine spacewalks totaling 62 hours and 6 minutes, the highest by a woman and fourth-highest overall, reflecting extensive experience in orbital maintenance and emergency repairs.
• NASA Administrator Jared Isaacman described her as a trailblazer whose leadership aboard the ISS advanced science, technology, and future exploration toward the Moon and Mars.
• A former US Navy captain and test pilot, Williams has logged 4,000+ flight hours across 40 aircraft, combining aviation expertise with space mission leadership and crew operations.
• Her final mission included the Boeing Starliner Crew Flight Test, followed by return via SpaceX Crew-9 in March 2025, after commanding Expedition 72.