Timeline of spaceflight

This is a timeline of known spaceflights, both crewed and uncrewed, sorted chronologically by launch date.

Due to its large size, the timeline has been split into smaller articles, one for each year since 1951.

For the purpose of these lists, a spaceflight is defined as any flight that crosses the Kármán line, the FAI-recognized edge of space, which is 100 kilometres (62 miles) above mean sea level (AMSL).

[1] The timeline contains all the flights which have either crossed the edge of space, were intended to do so but failed, or are planned in the near future.

Notable test flights of spaceflight systems may be listed even if they were not planned to reach space.