This is a list of space travelers by first flight. The table is listed in chronological order from the date of first flight. The table adheres to a common definition of a space traveller; the Fédération Aéronautique Internationale criterion of achieving an altitude higher than , thereby crossing the FAI-defined Kármán line. The criteria for determining who has achieved human spaceflight vary. Personnel who qualify only for the United States Astronaut Badge, awarded to those who achieve an altitude of , are listed at the X-15's highest flights and the VSS Unity test flights.
Space travellers Table parameters
Legend Italics Sub-orbital spaceflights that crossed . ◉ After the name, denotes sub-orbital space travellers who have flown into orbit on a subsequent space flight. △ After the name, denotes space travellers who have flown to the Moon without landing. ▲ After the name, denotes space travellers who have walked on the Moon. ‡ After the name, denotes those who died during their first spaceflight.Fatalities which occurred during training or testing are not included in this list, but can be found in the list of spaceflight-related accidents and incidents. † After the name, denotes those who died during a subsequent spaceflight. ⊗ After the name, denotes those whose first spaceflight had begun and was clearly intendedi.e. In a class of vehicle that had already been flight-proven above , for most of its launches. to cross , but failed to do so. Linked country In the 'Nationality' column, denotes the first from that country to pass .In cases where the first space traveller from a particular country flew on a sub-orbital flight, that flight is also linked in italics. Unlinked name Subsequent table entry for a space traveller who made or attempted a previous spaceflight.Most space travellers have a single entry in the table dated on the launch of their first spaceflight or attempt thereof. The only exception is when a traveller successfully crossed for the first time after a failed attempt.
All entries are dated from launch time in Coordinated Universal Time (UTC), which on occasion is one day earlier than the local date of launches from sites in the Eastern Hemisphere such as Baikonur and one day later than the local date of launches from sites in the Western Hemisphere such as Cape Canaveral.
As a rule, dual nationals fly under a single flag when flying as professional spacecrew and/or when flying on government-operated spacecraft, and this is the flag they are listed under in the table. For the spaceflights of dual nationals who are private citizens flying on commercial spacecraft as ordinary passengers, the flags displayed are those of their countries of birth, unless the space traveller did not hold citizenship of that country and/or otherwise made clear they intended to represent a different nationality.
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