No, you cannot enter Aruba with just a birth certificate in 2026. All U.S. citizens arriving by air are strictly required to have a valid U.S. Passport Book that is valid for the entire duration of their stay. While "closed-loop" cruises (starting and ending at the same U.S. port) occasionally allow a birth certificate and a government-issued photo ID under the Western Hemisphere Travel Initiative, the Aruban government and major airlines strongly recommend a passport for all travelers to avoid being denied boarding. Additionally, in 2026, all visitors must complete the Online ED Card (Embarkation-Disembarkation) before arrival and pay a $20 Sustainability Fee (introduced in 2024). Relying on a birth certificate for international air travel is a high-risk mistake that will likely result in you being turned away at the airport. Ensure your passport has at least one blank page for the entry stamp to satisfy Aruban migration officers.