Quick Facts
Astronaut Frank Rubio holds the NASA record for the single longest spaceflight at 371 days.
Astronaut Peggy Whitson holds the NASA record for the most cumulative days in space at 665 days.
NASA astronauts James Voss and Susan Helms hold the record for the longest spacewalk at eight hours and 56 minutes.
The most astronauts on the space station at one time is 13 and the first time this happened was in July 2009.
NASA astronauts often spend extended periods of time aboard the International Space Station. NASA tracks and publishes the single spaceflight record holders (the most days spent in space on a single mission) and the cumulative days in space record holders (combined time in space over an astronaut’s career).
NASA astronaut Frank Rubio holds the single spaceflight record at 371 days, followed closely by Mark Vande Hei and Scott Kelly. NASA astronaut Peggy Whitson holds the cumulative days in space record at 655 days.
| NASA Astronaut | Number of Days |
|---|---|
| Frank Rubio | 371 |
| Mark Vande Hei | 355 |
| Scott Kelly | 340 |
| Christina Koch | 328 |
| Peggy Whitson | 289 |
| Andrew Morgan | 272 |
| Michael Lopez-Alegria | 215 |
| Jessica Meir | 205 |
| NASA Astronaut | Number of Days |
|---|---|
| Peggy Whitson | 675 |
| Jeff Williams | 534 |
| Mark Vande Hei | 523 |
| Scott Kelly | 520 |
| Shane Kimbrough | 388 |
| Mike Fincke | 382 |
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