Want to wear some of this spring’s trends? The Biggest Spring 2018 Fashion Trends From the Designer Runways. Coming at you straight from the Spring/Summer 2019 runways at New York FashionWeek, here are all the trends you’re about to see. Our guide to the key fashion trends to know about for spring/summer. Prada went for a flouro approach, used to reflect a liberated woman. Our 2018 guide to spring fashion has all the best style trends, hottest clothing items, and latest runway collections.