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SCIENCE

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Physical - Astronomy

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Longest Spaceflight Durations

This list features the humans that have spent the longest consecutive time in space.

RANK

HUMAN

DAYS

DURATION

COUNTRY

1

Valeri Polyakov

437.7 days

08-01-1994 — 22-03-1995

Russia

2

Sergey Avdeev

379.6 days

13-08-1998 — 28-08-1999

Russia

3

Oleg Kononenko

373.8 days

15-09-2023 — 23-09-2024

Russia

Nikolai Chub

4

Sergey Prokopyev

370.9 days

21-09-2022 — 27-09-2023

Russia

Dmitry Petelin

Francisco Rubio

United States

5

Vladimir Titov

365.9 days

21-12-1987 — 21-12-1988

Soviet Union

Musa Manarov

6

Pyotr Dubrov

355.2 days

09-04-2021 — 30-03-2022

Russia

Mark T. Vande Hei

United States

7

Mikhail Kornienko

340.4 days

27-03-2015 — 01-03-2016

Russia

Scott Kelly

United States

8

Christina Koch

328.6 days

15-03-2019 — 06-02-2020

United States

9

Yuri Romanenko

326.5 days

05-02-1987 — 29-12-1987

Soviet Union

10

Sergei Krikalev

311.8 days

18-05-1991 — 25-03-1992

Soviet Union/Russia


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References

NASA (2024) Space Station Astronaut Record Holders. Available at: https://www.nasa.gov/international-space-station/space-station-astronaut-record-holders/ [Accessed 1 December 2025]. Wikipedia (2024) List of Spaceflight Records. Available at: https://en.wikipedia.org/wiki/List_of_spaceflight_records#Ten_longest_human_spaceflights [Accessed 1 December 2025]. Interfax (2024) According to official information, Russian astronaut Valeri Polyakov spent 437.6 days in space. Available at: https://interfax.com/newsroom/top-stories/105987/#:~:text=According%20to%20official%20information%2C%20Russian,January%201994%20and%20March%201995 [Accessed 1 December 2025]. FAI (2005) 11 October 2005: Russian cosmonaut Krikalev becomes absolute record holder for accumulated space. Available at: https://www.fai.org/news/11-october-2005-russian-cosmonaut-krikalev-becomes-absolute-record-holder-accumulated-space [Accessed 1 December 2025]. Spacefacts (n.d.) Soyuz TM-2 Mission. Available at: http://www.spacefacts.de/mission/english/soyuz-tm2.htm [Accessed 1 December 2025]. CNN (2020) NASA astronaut Christina Koch breaks spaceflight record. Available at: https://edition.cnn.com/2020/02/05/us/astronaut-christina-koch-spaceflight-record-scn/index.html [Accessed 1 December 2025]. Space.com (2016) Scott Kelly: Astronaut Biography. Available at: https://www.space.com/32907-scott-kelly-astronaut-biography.html [Accessed 1 December 2025]. Space.com (2019) Year in Space: Initial Findings Context. Available at: https://www.space.com/43205-year-in-space-astronauts-initial-findings-context.html [Accessed 1 December 2025]. NASA (2022) Record-breaking NASA astronaut Mark Vande Hei's contributions to human research studies. Available at: https://www.nasa.gov/humans-in-space/record-breaking-nasa-astronaut-mark-vande-heis-contributions-to-human-research-studies/ [Accessed 1 December 2025]. NASA (2021) Record-setting NASA astronaut crewmates return from space station. Available at: https://www.nasa.gov/news-release/record-setting-nasa-astronaut-crewmates-return-from-space-station-2/ [Accessed 1 December 2025]. BBC Newsround (2023) NASA astronaut sets new record. Available at: https://www.bbc.co.uk/newsround/66787072 [Accessed 1 December 2025]. CNN (2023) Longest stay in space: NASA astronaut Frank Rubio returns. Available at: https://edition.cnn.com/2023/03/29/world/longest-stay-in-space-nasa-frank-rubio-scn/index.html [Accessed 1 December 2025]. The Moscow Times (2024) Russian cosmonauts return to Earth after record ISS stay. Available at: https://www.themoscowtimes.com/2024/09/23/russian-cosmonauts-return-to-earth-after-record-iss-stay-a86443 [Accessed 1 December 2025]. Live Science (2024) Russian cosmonaut returns to Earth after completing record-breaking 1,111th day in space. Available at: https://www.livescience.com/space/space-exploration/russian-cosmonaut-returns-to-earth-after-completing-record-breaking-1-111th-day-in-space [Accessed 1 December 2025]. Oxford Reference (n.d.) Cosmonaut Selection. Available at: https://www.oxfordreference.com/display/10.1093/oi/authority.20110810104413909 [Accessed 1 December 2025].
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