Please note that Citizenship and Immigration Canada (CIC) has announced changes to the visa requirements for citizens from Antigua and Barbuda travelling to Canada. As of June 27, 2017, citizens from Antigua and Barbuda will need a visa to travel to Canada. At that time, any existing electronic travel authorization (eTA) issued to a citizen of Antigua and Barbuda will no longer be valid, and these travellers will not be able to use their eTA to travel to Canada.
More information is available on the CIC website.