In the present study, a comparative research of Palma and Antibes analyzes how the Sustainable Mobility Plans (SUMP) deal with the topic of overtourism. Here, after a rough idea of mobility policy in the two cities, there is a method of comparison in terms of content, in which various indicators of overtourism are projected onto the cities. There it should first be clarified how affected the coastal cities are by the respective situation and also what the answer is in the mobility plan. Finally, the two cities are compared on the basis of these plans and the sustainable potential of these as output is discussed in a comparative manner.