Longest Single Missions by NASA Astronauts

NASA astronaut Frank Rubio holds the record for the longest single spaceflight by an American at 371 days, surpassing Mark Vande Hei (355 days) and Scott Kelly (340 days).

Sources

• International Space Station Astronaut Record Holders - NASA
• Who has spent the longest time in space? | LiveNOW from FOX
• The longest continuous spaceflight in history — 437 days aboard the Russian Mir
• pbs.org

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