Jeff Williams Sets New Record for Cumulative Time in Space by an American

Currently serving as the Commander of the International Space Station, NASA Astronaut Jeff Williams isn’t scheduled to return to Earth until early September. As of today at 4:56 am ET, however, Jeff Williams’ cumulative total of 520 days, 10 hours, and 30 minutes in space (and counting) across four missions surpasses the previous American record set by newly-retired NASA astronaut Scott Kelly during his one year mission.

Russian cosmonaut Gennadi Padalka holds humanity’s record for cumulative time in space with a total of 879 days spanning four ISS missions and one Mir mission.

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