Following are the cases where you need to apply for ESTA:
- children; whether accompanied or not; (regardless of age) who are nationals of Visa Waiver Countries (VWPs) must have their own ESTA permit before travelling to the United States for a maximum of 90 days as tourists.
- if you have dual nationality, one from a VWP country and one from a non-VWP country; you must apply for an ESTA If you travel under the VWP with your VWP passport, otherwise the ESTA does not apply if you use the passport of a non-VWP country and in this case you must have a visa not an ESTA.
- If you are a permanent resident of Canada and a national of a country participating in the Visa Waiver Program (VWP) and you arrive in the United States by air or sea, you must apply for an ESTA.
- If you are a national of a country participating in the Visa Waiver Program (VWP) and you enter the United States by air or sea from Mexico or Canada, you must apply for an ESTA.
- If you are a national of a VWP country and plan to cross the U.S. only to travel to another country. You must make an ESTA request and do not forget to select the answer “yes” to the question “Is your trip to the United States only a transit to another country? ».
- If you are travelling from Guam or the Commonwealth of the Northern Mariana Islands (CNMI) to the U.S., an inspection is required to see if this trip is part of the VWP, in which case you will need to make an ESTA request.
- If you are a national of a VWP country and travel under the VWP to Puerto Rico or the United States Virgin Islands for short-term business or tourism, an ESTA application is required.
Cases where you do not have to apply for an ESTA:
- If you are not a national of a beneficiary country of the programme (VWP), you must have a VISA and therefore an ESTA does not apply to you.
- Not all US nationals or citizens need to apply for ESTA authorization to travel to the US. Their American passports replace the Visa or ESTA.
- Persons with valid visas will still be able to travel to the United States for the purposes for which they were issued and do not need to apply for an approved travel authorization (ESTA) when travelling.
- If you are a legal permanent resident of the United States and a national of countries benefiting from the Visa Waiver Program (VWP), you do not need an ESTA.
- If you are travelling on a Canadian passport, the ESTA application for authorized travel is not required as well.
- If you are a national of a country participating in the Visa Waiver Program (VWP) and enter the United States by land from Mexico or Canada, an ESTA application is not required. However, you will need to complete the paper I-94W form and complete a manual entry process at the land border crossing. Unlike if you have ESTA, you will not be required to complete the I-94W form and your registration process will be accelerated.
ESTA is not required if you are a permanent resident of Canada and a national of a VWP beneficiary country and enter the U.S. by land. However, having an approved ESTA in this case will facilitate your entry into the United States and eliminate the I-94W form.
Concerning GUAM and the Commonwealth of the Northern Mariana Islands (CNMI), if you wish to visit these two destinations and you benefit from the Visa Waiver Program (VWP), you will not need an ESTA. However, you cannot exceed a maximum stay of 45 days and you will not be allowed to return to the U.S.
If you are travelling to GUAM and the Commonwealth of the Northern Mariana Islands (CNMI) from the United States, no ESTA is required as this trip is considered a domestic flight.