Marine spatial planning (MSP) and land-use or terrestrial spatial planning (TSP) usually operate separately, with numerous mismatches, even though there are many reasons for integration between them and for coordinating activities along coasts and in nearshore marine areas. We developed a framework and used it to analyse the extent to which a marine plan and a coastal plan for Israeli Red Sea waters were coordinated and contributed to land-sea integration. Our analysis revealed some harmony between the plans, due partly to overlapping leadership of the planning processes, and a good level of understanding of environmental concerns and land-sea interaction, but with differing emphases on the degree of development, especially for tourism in relatively unspoiled areas. The way in which spatial priorities play out across land and sea is a key issue for TSP-MSP integration and will vary between contexts but is likely to reflect the profoundly different spheres of land and sea planning. The practice of planning must be responsive to both terrestrial and marine environments in order to achieve integrated spatial outcomes using a 'one space' approach. Given the established principle of aiming for such integration within MSP discourse, the MSP community is well-placed to promote integration for planning and for environmental policy as a whole.