All individuals who wish to travel to the United States for a short period of time (up to 90 days) and who are citizens of any of the Visa Waiver Countries must apply by making a registration through the ESTA form. United Kingdom, Australia and New Zealand are among the 38 Visa Waiver countries that are eligible to apply for an ESTA Visa. If a traveler is planning to transit through the United States en route to another country, an authorization via ESTA is still required.
An approved ESTA will allow its holders to travel freely around the USA as well as the following territories, which are part of the country:
Eligible children are also required to apply for an ESTA, regardless of their age. Each individual, entering the US, must present a legal permit to do so.
Changes in the traveller’s passport as well as having an expired passport will require a new ESTA application.
For more information visit the section, ESTA application.
Note that the number of trips to the US does not relate to the ESTA validity – travellers can make multiple trips, without having to apply for a new ESTA after each one.
Green Card holders (permanent residents of the US) are not required to apply for ESTA.