Whether you pass through customs at Athens International Airport (ATH) in 2026 depends on your origin and final destination. If you are arriving from a non-Schengen country (like the US, UK, or India) and Athens is your final stop or a gateway to a Schengen destination (like Rome), you must go through Passport Control and Customs. Customs is generally a quick process where you walk through the "Nothing to Declare" green channel unless you have restricted items. However, if you are transferring from one non-Schengen flight to another (e.g., London to Dubai via Athens) and staying in the international transit area, you usually do not clear customs. For those entering the Schengen Area, remember that you are limited to 10,000 euros in cash without declaration. Always follow the specific signs for "Area A" (Non-Schengen) or "Area B" (Schengen/Domestic) to ensure you hit the correct checkpoints.