https://www.bluefinutah.com/forum/general-discussion/how-to-cancel-a-delta-airlines-flight-fast-step-by-step-guide-for-passengers

https://www.tickersandtimbers.com/forum/general-discussion/frontier-airlines-cancellation-policy-explained-key-tips-for-canceling-flights

https://developers.directscale.com/discuss/66d8ab15d45b4700143a3700

https://developers.directscale.com/discuss/66d8a45644fedd003047dc1c

https://sagebusinesscloudaccounting.ideas.aha.io/ideas/S1-I-72717

What is Delta

https://techcommunity.microsoft.com/t5/excel/step-by-step-guide-for-passengers-how-do-i-cancel-my-flight-on/m-p/4234854#M237483 How do I kno...