This is a timeline of known spaceflights, both manned and unmanned, sorted chronologically by launch date. Owing to its large size, the timeline is split into smaller articles, one for each year since 1951. There is a separate list for all flights that occurred before 1951.
The 2015 list, and lists for subsequent years, may contain launches which have not yet occurred.
For the purpose of this article, a spaceflight is defined as any flight that crosses the Karman line, the officially recognised edge of space, which is 100 kilometres (62 mi) above mean sea level (AMSL). The timeline contains all flights which have done so, were intended to do so but failed, or are planned to do so in the not-too-distant future.