Do setting sprays actually make makeup last longer?

The consensus across mainstream beauty coverage and specialist subreddit threads is yes, but the effect is dramatic only when the formula matches your skin type and base products. Long-wear alcohol-based sprays (like the Urban Decay All Nighter family and L'Oréal's Infallible 3-Second) get the most credit for extending wear, while hydrating mists like Charlotte Tilbury Airbrush Flawless are credited more for finish than for raw hours.