Completing a Request for Travel Authorization (RTA) is the first thing you should do when you start planning a trip for employees, prospective employees, or students using a centrally billed airfare or requesting reimbursement for travel on university business.
The travel document usually arrives within 150 days (sometimes longer) after submitting your application. You can't leave the country until you have your approved travel document in hand, so you should expect to spend the 3–5 months after submitting your green card application in the United States.
How to apply for an Electronic Travel Authorization (eTA) Applying for an eTA is an easy online process. Applicants will need a valid passport, a credit card, and an email and can get their eTA approval via email. The application is then stored and linked to the applicant's passport number.
Who already have a visa in their passport. Travelers may wish to avoid buying plane tickets until they have obtained an ESTA (or a valid visa, in case the ESTA is not approved). ESTA applications may be submitted at any time prior to travel. The processing of an ESTA can take up to 72 hours.
Select “Traveler.” Select “Air”, then select “Continue” to begin. Select “Scan Passport” and scan the information page of your passport. Select “Advance Travel Authorization”, then select “Request Advance Travel Authorization.” First time users will be prompted to create a profile.
If you are requesting expedited processing of a travel document, you generally need to apply for and obtain the document before you leave the United States. You should make your expedite request on your pending application at least 45 days before you plan to leave the United States.