Originally Posted by
byeargin1
It is my understanding that it does not matter if you purchase the ticket with the Delta AMEX or not, as long as you can provide it at time of check-in you get one free bag per ticketed passenger. I have not checked a bag since this promotion has come out, so am not positive.
You don't even need to provide the card at check-in. If you've got the card, Delta knows about it (that's how they credit you with the SkyPesos). When you check in, "1 (free)" shows up in the drop-down for DL AmEx holders, regardless of how the ticket was purchased.