https://www.devex.com/people/how-long-do-i-have-to-cancel-a-delta-flight-without-penalty-2272885
https://www.devex.com/people/how-do-i-cancel-a-flight-and-get-a-refund-from-delta-airlines-2272892
https://www.devex.com/people/how-late-can-i-cancel-my-air-canada-flight-2277378
https://www.devex.com/people/does-air-canada-offer-a-24-hour-flight-cancellation-policy-2277425
https://www.devex.com/people/can-i-receive-a-refund-if-i-cancel-my-air-canada-flight-within-24-hours-2277491
https://www.devex.com/people/is-it-possible-to-cancel-an-air-canada-flight-without-incurring-a-penalty-2277503
https://www.devex.com/people/how-much-time-do-i-have-to-cancel-an-air-canada-flight-without-a-penalty-2277519