United States
https://www.entmasterclass.com/forum/general-discussion/cancellation-policy
https://www.entmasterclass.com/forum/general-discussion/____r-10
https://www.entmasterclass.com/forum/general-discussion/a-c-a-american-cancellation-policy-help-us
https://www.entmasterclass.com/forum/general-discussion/ir-n-g-ligh-s-what-days-are-cheaper-to-fly-with-air-canada