The aim of this paper is the analysis of mobility and spatial dispersion in internal migrations and its relation with GDP convergence in Spain. The study of mobility is carried out using two measures based on Markov chains, which belong to a general family of mobility measures based on the distance between locations of origin and destination. For the study of spatial dispersion, a measure coming from the concept of entropy is used. The application of these measures to the sequence of matrixes of migratory flows between regions in 1986-2003 provides evidence of the loss of the role of internal migrations as a correction element of regional income disparities.