Does anyone have an idea because im thinking of using them for a ticket non stop from jfk to tlv which is 160,000 miles vs selling them and buying the ticket.
How much would it cost you to buy the ticket? If it's less than $1,700 to buy then it's
definitely worth paying cash for the ticket. If it's more than that (with cash), it might still be worth it (With the right broker, you might be able to get 1.2-1.5 for the Delta).
(and no, don't come asking me who the right broker is)