Normally, an ESTA is approved in the first minutes or hours after successful payment of the processing fee. In certain special cases, however, this may take significantly longer.
In rare cases, requests are checked for details, for example when the authority has reason to believe that certain questions have been answered untruthfully. Samples in which the applicant is thoroughly screened are also not excluded. Sometimes, however, only the website of the official authority is offline and a permit that may have been issued beautifully cannot yet be retrieved online. In any case, it is recommended to submit the application with sufficient advance notice. This is the only way to ensure that you receive your ESTA on time