Check out if you need an ESTA to travel to USA
Foreign nationals from the following countries will need an ESTA before boarding their flight to USA:
What's an ESTA?
ESTA stands for Electronic System for Travel Authorization. ESTA is an online application system developed by the United States government to pre-screen travelers before they are allowed to board an airplane or ship bound for the United States. Starting on January 12, 2009, any person entering the United States under the visa waiver program is required to hold an approved ESTA Travel Authorization.
Who needs to Apply for an ESTA?
All travelers entering the United States (by air or sea) under the visa waiver program are required to hold a valid ESTA travel authorization. The purpose of ESTA is to allow the US Department of Homeland Security to pre-screen all Visa Waiver Travelers before they leave their respective countries. U.S.-bound travelers are recommended to apply for a Travel Authorization at least 72 hours prior to departure.