Top 3 Longest Crewed Spaceflight Missions

Comparing current SpaceX crew rotations with the longest human endurance records in orbital history.

The top 3

1. Valeri Polyakov's Record Stay: Cosmonaut Valeri Polyakov holds the record for the single longest human spaceflight at 437 days on the Mir station. Valeri Polyakov
2. Scott Kelly's Year in Space: NASA astronaut Scott Kelly completed a historic 340-day mission to study the effects of long-duration spaceflight on the human body. Scott Kelly
3. Sergey Avdeyev's Endurance: Cosmonaut Sergey Avdeyev spent a total of 747 cumulative days in space across three separate missions. Sergey Avdeyev

Sources

• NASA Human Spaceflight History

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