From maps, I am guessing the Via de la Plata route starting in Seville, Spain -or- the Portuguese route starting in Lisbon would make sense as the entry points - but since you are flying so far to get back to the mainland of Europe, I guess you could start from any of the other routes. (But those two seem to make logistical sense to me)
@@StingyNomads So, it's not an actual Camino de Santiago route then? (If it does not go to Santiago de Compostela - meaning finishing that last required bit to "count.") No matter what, It seems like you could tie it in via Southern Portugal, even if that first bit would not "count" and you would officially be doing one of the Portuguese routes.