United States
https://www.entmasterclass.com/forum/general-discussion/does-air-canada-allow-name-changes-on-tickets-1
https://www.entmasterclass.com/forum/general-discussion/easy-refund-1-866-738-0640-air-canada-refund-policy
https://www.entmasterclass.com/forum/general-discussion/what-is-the-cheapest-day-to-buy-flights-on-united-1