Many forms of contemporary migration appear to be reactions to global injustices. Theories of global justice, yet, have not paid much attention to migration for a long time and sometimes even see migration as a phenomenon that reinforces global injustice. This article first reviews some recent approaches that have been developed to justify claims to migration on the basis of principles of global justice or violations of such principles. These approaches, though, show difficulties in adequately responding to empirical migration, the impact of development aid or the factors that lead to current injustice. Against this background, the article asks whether the opposite position, namely, to prove that migration is undesirable due to demands for global justice, is more convincing. It turns out that here, too, migration is ultimately not rejected for reasons of justice, but because it does not help to alleviate the suffering caused by injustice. In a third step, the proposal to distribute the costs of forced migration in a globally fair manner is briefly examined. Given its difficulty to properly address global injustice as the main reason for forced migration, the article ends with a call to approach migration against the backdrop of a theory of global justice that focuses on the distribution of opportunities to exercise control over the global conditions.