- By Ridam Sharma
- Fri, 27 Jun 2025 02:44 PM (IST)
- Source:JND
Astronauts with Maximum Space Time: Space and astronauts have always been a topic of fascination for people across the world. Especially, NASA, the National Aeronautics and Space Administration, has deployed numerous astronauts on long-duration spaceflight missions to the International Space Station (ISS) and has shaped the modern world of space technology and space exploration. To know more, here’s a list of the astronauts who have spent the maximum number of days in space, their contributions, and their records, as per NASA data.
In another space news, India's Group Captain Subhanshu Shukla is making headlines for being one of the four crew members of Axiom Mission 4, which is widely known as Axiom 4. It is a landmark mission in space travel, which took off on June 25, 2025. The historic mission was executed by Axiom Space in collaboration with NASA. With this historic space trip, Subhanshu Shukla has become the first Indian to set foot on the ISS, but also the second Indian in history to travel to space after Rakesh Sharma's flight in 1984.
Also Read: Jagran Opinion: Shubhanshu Shukla's Mission Powers India's Space Future
List Of Astronauts Who Have Spent The Maximum Number Of Days In Space:
| NASA Astronaut | Number of Days |
| Peggy Whitson | 675 |
| Suni Williams | 608 |
| Don Pettit | 590 |
| Jeff Williams | 534 |
| Mark Vande Hei | 523 |
| Scott Kelly | 520 |
| Mike Barratt | 447 |
Source: NASA
1. Peggy A. Whitson – 675 Days
Peggy Whitson has spent the maximum number of days in space, among all NASA astronauts, which was a total stay of 675 days. Her record-breaking career is about numerous space missions to the ISS, especially the recent nine-day stay on the Axiom-2 mission in 2023.
Astronauts Who Have Spent The Longest Time in Space (Image Credit: Instagram)
2. Sunita L. Williams – 608 Days
Sunita Williams is one of the most famous astronauts across the globe, all thanks to her record-breaking spacewalks throughout her years of space career. She has flown on four spaceflights till now, including extended-duration flights on Expeditions 14/15, 32/33, and 71/72. Williams holds the record for the longest spacewalk performed by a woman and was the first to complete a marathon in space. Her overall 608-day stay in space happened due to the extension of the mission due to technical problems with the Boeing Starliner spacecraft.
Astronauts Who Have Spent The Longest Time in Space (Image Credit: Instagram)
3. Don Pettit – 590 Days
Don Pettit is widely respected for his contributions to ISS's space missions, especially his scientific research and technology-related inputs. His overall time in space was 590 days, which comprises many successful missions.
Astronauts Who Have Spent The Longest Time in Space (Image Credit: Instagram)
4. Jeff Williams – 534 Days
Jeff Williams spent a total of 534 days in space across all four missions and has significantly contributed to the design, build, and operation of the ISS. He was on his last long-duration mission, Expedition 47, in 2016, during which he spent 172 days performing scientific experiments and station maintenance.
Astronauts Who Have Spent The Longest Time in Space (Image Credit: Instagram)
5. Mark Vande Hei – 523 Days
Mark Vande Hei is among the few American astronauts who have boarded one of the longest single spaceflights, which was an impressive total of 355 consecutive days on the International Space Station (ISS) from June 2021 to April 2022. However, his total day spent in space is a total of 523 days.
Astronauts Who Have Spent The Longest Time in Space (Image Credit: Instagram)
6. Scott Kelly – 520 Days
Scott Kelly became popular for his almost year-long tour on the ISS, which helped NASA with its research on the physiological and psychological effects of long-duration spaceflight. He spent a cumulative 520 days in space.
7. Mike Barratt – 447 Days
Mike Barratt went on two missions, and during these missions, he spent a total of 447 days in space.
Astronauts Who Have Spent The Longest Time in Space (Image Credit: Instagram)
These space astronauts have shaped space missions across the globe. Their combined time in space not only made records but also provided mankind with valuable information regarding human adaptability off the planet and significantly impacted NASA's mission to explore deeper into the solar system.
