Whether you go through security at Zurich Airport (ZRH) in 2026 depends on the country your flight originated in. If you are arriving from a "clean" country (mostly Schengen Area countries like Germany or Italy, plus the U.S., Canada, and the UK), you typically do not need to go through security again when connecting to another flight, provided you stay within the airside transit area. However, if you are arriving from a country with different security standards (most non-Schengen/non-Western nations), you will be funneled into a security checkpoint before you can reach your departure gate. Additionally, if your connection involves moving between the main terminals (A, B, D) and the satellite Terminal E via the Skymetro, you will undergo a passport check if moving between Schengen and non-Schengen zones. For 2026 "Self-Connecting" travelers who have to collect and re-check bags, clearing security is always mandatory.