Since the beginning of the twenty-first century, changes have occurred in the regional dynamics of international migration and in the ways governments manage human mobility. This article argues that the migratory system connecting the three northern countries of Central America (Guatemala, El Salvador, and Honduras) with Mexico and the United States has not been accompanied by regional management of migratory flows. Instead, a succession of government plans and projects reveals a perspective marked by the effects of the “externalization” of US borders, leading to more complex migration routes and increased vulnerability of migrants. The article discusses how externalized control policies influence migratory spaces, routes, and timelines, and leave many stranded in transit countries before they eventually arrive at their intended destinations. Reconsidering the process of mobility in light of migration management policies would appropriately enlarge the traditional economic, social, cultural, and environmental factors that affect migration strategies.