19 years - Space Shuttle Endeavor made it's maiden voyage on this day in 1992. 19 years later, on this same day, Endeavor made it's final commission in space. The Endeavor shuttle was the last shuttle to be built. The first was Enterprise, followed by Columbia, Challenger, Atlantis, and Discovery. Endeavor was built in 1991 to replace Challenger, which exploded in 1986. The space shuttle program came to an end in 2011 after the final flight of Atlantis on July 21, 2011. The shuttles had been in service for 30 years.