How many Apollo missions have been successful?

Answer 1

There have been 19 Apollo missions (1A & 1 - 17). All bar one have either been successful or partially successful.

The one mission that was a failure was Apollo 1 where the command module destroyed and three astronauts killed on 27 January 1967 by fire in the module during a test exercise.

The most famous almost failure was Apollo 13 which is classed as a successful failure as no one died - problematic oscillations on start, unrelated explosion in service module during Earth-Moon transition caused mission to be aborted - crew took temporary refuge in lunar module and eventually returned to Earth with command module after single pass around Moon and made it through reentry.

Outside of the imagination of the lunatic fringe, there was no Apollo 18 flight. Apollo 18 was cancelled by Nixon, as he wanted Apollo, which had been started by Kennedy, to generate no more successes that would be credited to the Democrats. He even went so far as to rename Cape Kennedy, "Cape Canaveral". The Apollo 18 capsule, which had already been built, was wasted on a publicity stunt called "Apollo-Soyuz", which was supposedly a test of an emergency linkage that would allow Russian and American spacecraft to rescue one another.