It takes about 10-20 minutes to complete the ETIAS online application. Once the application has been submitted, it will be processed instantly, and you will receive a decision to the email address you provided in your application between 24 to 48h after submission. However, some applications may take longer to process, up to 72 hours (3 days).
The application process takes a maximum of 10 minutes in total and processing the request takes approximately 24 hours but in some cases it can take up to 48 hours maximum. This is why it is recommended that travelers apply for the ETA at least 2 days before departure to avoid any possible delays.