This paper aims to review the causes of international migration and the potential impact of FTAs (Free TradeAgreements) on latin american migrations. The first part describes the economic and non-economic causes for migration. The second one shows the potential impact of FTAs in the economy (job creation/destruction by sectors) in CAFTA countries and Colombia.The last part shows that there is little correlation between the commercial openness (FTAs) and the reduction of poverty. Poverty seems to be increasing in the studied countries –even more in those with the most open commercial regimens, than in those with the most closed ones. Data proves that openness doesn’t reduce the poverty automatically; on the contrary, in some (regional or subregional) cases it increases and causes a major determinant of international migration in latin american countries.