United States
https://www.newmanparish.com/forum/questions-answers/n-l-y-royal-jodanian-tm-1-866-738-0640-tm-airline-refund-policy
https://www.entmasterclass.com/forum/general-discussion/fast-accurate-air-canada-refund-policy-24-7
https://www.ielsm.com/forum/discusiones-generales/what-is-the-day-to-buy-united-tickets