First study to our knowledge to quantify the influence extratropical cyclones have on the temporal variability of springtime surface ozone (O₃) measured on the west coast of Europe when cyclones are nearby. We show passing cyclones have a discernible influence on surface O₃ concentrations. In-depth findings from four case studies, using a combination of reanalyses and a modeled tracer, demonstrate there are several transport pathways before O₃-rich air eventually reaches the surface.