What is ESTA?

Yes, you require your passport to travel to the US as well as your ESTA asthe authorisation is centred around your passport number. This must be an electronicpassport (ePassport) with a digital chip containing biometric information about thepassport owner and that also has a machine readable zone on the biographic page.

Your ESTA authorisation needs to be valid for when you enter the U.S. and will allow you to stay within U.S. territory for up to 90 days from when you land. Therefore, it is okay if your ESTA does not remain not valid throughout your stay in the United States as long as you do not overstay the limit of 90 days.

Yes, all applicants for ESTA must have unexpired, up-to-date, and valid digital passports. This also applies to children of all ages, including infants. The passport must remain valid for the entire duration of your stay in the United States.