An Electronic Travel Authorization (eTA) is an entry requirement for visa-exempt foreign nationals travelling to Canada by air. Exceptions include U.S. citizens and travellers with a valid visa. Entry requirements for other methods of travel (land, sea) have not changed. Eligible travellers can apply online for an eTA. This entry is mandatory and travellers who require one will need an eTA before they can board a flight to Canada. Find out more about Electronic Travel Authorization (eTA).