The US border is one of the toughest in the world. In a typical year, more than 270,000 travelers are denied entry for various reasons. Learn about the main causes for US entry refusal and how to avoid it when traveling to the USA.

Entering the United States in 2026 is a process governed by high-tech security and strict documentation requirements, which can feel "difficult" or intimidating for the unprepared. As of early 2026, expanded travel restrictions apply to certain nationalities, and the ESTA system for Visa Waiver Program countries features higher fees and more rigorous vetting. However, for most travelers with a valid visa or ESTA, the process is streamlined by the Mobile Passport Control (MPC) app and "Global Entry" kiosks, which reduce wait times significantly. You should be prepared for direct questions regarding your itinerary, financial means, and the contents of your luggage (especially food items). While the "biometric" entry-exit system is now standard at most major hubs like JFK and LAX, the difficulty is largely mitigated by having all digital and physical documents ready and being transparent with the CBP officers.