The criteria for what constitutes
human spaceflight vary. The
Fédération Aéronautique Internationale (FAI) Sporting Code for astronautics recognizes only flights that exceed an
altitude of 100 kilometers (62 mi).
 In the United States, professional, military, and commercial astronauts who travel above an altitude of 50 miles (80 km)
 are awarded
As of 17 November 201636 countries have reached 100 km (62 mi) or more in altitude, of which 549 reached
low Earth orbit or beyond.
 Of these,
24 people have traveled beyond low Earth orbit, to either lunar orbit, the lunar surface, or in one case a loop around the Moon;
 three of the 24 did so twice:
John Young and
 The three current astronauts who have flown without reaching low Earth orbit are
Mike Melvill, and
Brian Binnie, who participated in suborbital missions.
, a total of 552 people from
As of 17 November 2016X-15 pilots who exceeded 50 miles (80 km) in altitude, only one exceeded 100 kilometers (about 62 miles).
 Space travelers have spent over 41,790
man-days (114.5 man-years) in space, including over 100 astronaut-days of
 As of 2016, the man with the longest cumulative time in space is
Gennady Padalka, who has spent 879 days in space.
Peggy A. Whitson holds the record for the most time in space by a woman, 377 days.
, under the U.S. definition 558 people qualify as having reached space, above 50 miles (80 km) altitude. Of eight