ABSTRACT: Assessing the impact of sea level changes on airports across the present century is a pressing issue for the rapidly expanding aviation sector and, more generally, for establishing adaptation strategies. To date, these assessments have assumed that future melting of ice sheets and glaciers leads to globally uniform sea level changes. We summarize recent geophysical research that highlights the extreme geographic variability in sea level that will occur in response to such melting. As a case study, we present modeling predictions of sea level change to 2100 CE based on a suite of published projections of polar ice mass flux and consider the implications of these results for airports identified as being at particularly high risk from sea level rise. We conclude that this important source of sea level variability should be incorporated – together with other processes that imprint a geographic pattern on sea level (e.g., storm surges, tides, thermosteric and ocean dynamic changes) – into projections of airport risks in a warming world.