Longest Single Continuous Spaceflight

Valeri Polyakov, a Russian cosmonaut, holds the record for the longest single continuous stay in space, spending 437 days and 18 hours aboard the Mir space station from 1994 to 1995.

Sources

• Valeri Polyakov - Wikipedia
• The longest continuous spaceflight in history — 437 days aboard the Russian Mir space station, completed by cosmonaut Valeri Polyakov in 1995 — was specifically conducted to prove that a human being could survive a round-trip mission to Mars, in a piece of human endurance that has been waiting unused on a shelf for three decades - Space Daily
• Valery Vladimirovich Polyakov | Encyclopedia.com
• Setting the record: Fourteen months aboard Mir was dream mission for Polyakov
• Valeri Polyakov, record-breaking cosmonaut, dies at age 80 - Astronomy Magazine

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