It is compulsory for travelers taking US flights air tickets under the Visa Waiver Program to provide their details online at least 72 hours before to travel. This system is widely known as Electronic System for Travel Authorization (ESTA) which is imperative for entry in the country. ESTA is generally valid for two years or the validity of the traveler’s passport visitors needing more information can visit the ESTA USA Travel.
Why is a Travel Authorization via ESTA required for VWP Travelers?
U.S. territory law required the Department of Homeland Security to appliance an electronic travel authorization system and other scale to increase the security of the Visa Waiver Program.
ESTA afford a layer of security that allows DHS to determine in advance of travel whether an individual is eligible to travel to the United States under the VWP and whether such travel structure a law enforcement and security risk.