Apply online for an eTA. Canada has introduced a new entry requirement, known as an Electronic Travel Authorization (eTA), for certain international travellers who fly to Canada.Most travellers need a visa or an Electronic Travel Authorization (eTA) to fly to, or transit through, a Canadian airport. Know what documents a child needs to travel to or from the U.S. All children, including infants, must have their own travel documents. See what documents a child needs to travel to or from the US alone or with a parent or relative. Non-US citizen children traveling to the US. Online Nonimmigrant Visa Application, Form DS-160 – Learn more about completing the DS-160. A duly filled out TTS Services Consent Form. Steps to become a Canadian citizen. Get proof of citizenship.