https://knowt.com/note/82ef7399-e69f-4d15-9b1b-60635dea7617/How-do-I-know-if-my-Delta-ticket-is-refu youmobs 2 days ago https://knowt.com/note/82ef7399-e69f-4d15-9b1b-60635dea7617/How-do-I-know-if-my-Delta-ticket-is-refu