The highest speed with which a man travelled was ...
2,479 mph (3,896 km/h)
8,791 mph (14,147 km/h)
24,791 mph (39,896 km/h)
87,910 mph (141,470 km/h)
According to the 2002 Guinness World Records, Apollo 10 set the record for the highest speed attained by a manned vehicle: 39,897 km/h (11.08 km/s or 24,791 mph) on May 26, 1969, during the return from the Moon.  
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Answers by country
2,479 mph (3,896 km/h)
8,791 mph (14,147 km/h)
24,791 mph (39,896 km/h)
87,910 mph (141,470 km/h)
answers
 Estonia
Estonia14
 France
France15
 Lebanon
Lebanon12
 Malaysia
Malaysia11
 the Netherlands
the Netherlands15
 the United States
the United States226
 Poland
Poland4102
 Austria
Austria65
 Canada
Canada24
 Unknown
Unknown13
 Germany
Germany530
 the United Kingdom
the United Kingdom115
 Switzerland
Switzerland44
 Pakistan
Pakistan21
 the Philippines
the Philippines34
 Republic of Ireland
Republic of Ireland10
 India
India376
 Australia
Australia51
 Greece
Greece16