The Visa Waiver Program (VWP) enables eligible citizens or nationals of certain countries to travel to the United States for tourism or business for stays of 90 days or less without obtaining a visa.
A new online system is available for citizens and eligible nationals of VWP countries to apply for advance authorisation to travel to the United States.
Effective 12th January 2009, all VWP travellers will be required to obtain an electronic travel authorisation prior to boarding a carrier to travel by air or sea to the U.S. under the VWP.
Applications may be submitted at any time prior to travel, however it is recommended that applications are submitted no less than 72 hours prior to travel. In most cases you will receive a response within seconds.
In cases where authorisation is denied, it is strongly recommended that a non-immigrant visa is obtained at a US Embassy or Consulate before arriving at the airport.
Find out more about VWP countries and apply for travel authorization online(Opens an external website in a new tab)