Whether you can enter Switzerland with "just a passport" in 2026 depends entirely on your nationality and the specific travel rules active late this year. For citizens of visa-exempt countries like the USA, UK, Canada, and Australia, a passport remains the primary high-fidelity requirement, but a major shift is occurring in late 2026 with the full implementation of the ETIAS (European Travel Information and Authorisation System). While you won't need a full visa, you will be required to register online and pay a small fee to receive digital authorization linked to your passport before boarding. Your passport must also meet high-fidelity Schengen standards: it must be valid for at least three months beyond your planned departure date and have been issued within the last 10 years. Conversely, travelers from countries not on the visa-exempt list, such as India, will still require a high-fidelity Schengen Type C Visa in addition to their passport. It is a necessity to check the current 2026 ETIAS status before your flight to avoid a high-fidelity denial at the boarding gate.