United States
https://www.entmasterclass.com/forum/general-discussion/1b9252ad
https://www.entmasterclass.com/forum/general-discussion/what-are-the-cheapest-days-to-fly-on-united-airlines-united
https://www.entmasterclass.com/forum/general-discussion/american-cancellation-policy-aa-dail
https://www.entmasterclass.com/forum/general-discussion/r-j-1-866-738-0640-how-do-i-cancel-my-flight-on-rj