On March 26, 2026, Lisbon's Humberto Delgado Airport announced the complete restoration of its EU border control system after a brief outage disrupted passenger processing. The issue, linked to a technical glitch in the Entry/Exit System (EES) and European Travel Information and Authorisation System (ETIAS), halted biometric checks and caused delays for incoming flights. Airport officials confirmed normal operations resumed by late afternoon, allowing seamless border crossings for travelers across the Schengen Area. The disruption stemmed from a software synchronization failure affecting multiple EU entry points, though Lisbon was among the hardest hit due to high traffic volumes. No data breaches or security lapses were reported, and the Portuguese Immigration and Borders Service coordinated with EU counterparts to expedite the fix. Airlines, including TAP Air Portugal, reported minimal flight diversions but urged passengers to check for updates. This incident underscores ongoing challenges in scaling EU digital border technologies amid rising travel demands. Full services are now operational, with authorities monitoring for any residual effects.