According to the Michelin route-finder, central Paris to central Barcelona is 1038km. See http://www.viamichelin.co.uk/viamichelin/gbr/dyn/controller/ItiWGPerformPage?reinit=1&strStartCityCountry=1424&strStartAddress=&strStartCP=&strStartCity=Calais&strDestCityCountry=311&strDestAddress=&strDestCP=8433+&strDestCity=Middelkerke+-+Mannekensvere&image2.x=50&image2.y=13
for route and map.