This is a list of human spaceflight programs, including successful programs, programs that were canceled, and programs planned for the future. The criteria for what constitutes human spaceflight vary. The FAI defines spaceflight as any flight over 100 kilometres (62 mi). However, in the United States, professional, military, and commercial astronauts who travel above an altitude of 80 kilometres (50 mi) are awarded astronaut wings.
Until the 21st century, spaceflight programs were sponsored exclusively by governments, either by the military or by civilian space agencies. However, with the launch of the privately-funded SpaceShipOne in 2005, a new category of spaceflight programs – commercial spaceflight – arrived.
Programs in this article are sorted by the years when their development started.
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—Henry David Thoreau (1817–1862)
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