I have a 600 dollar Delta Voucher, My travel routes have changed and right now I am not sure if I will be using it before it expires. Is there anything other tickets that they can be used on. For example can I use them to buy skymiles. I went on line but all i could see was cc number option. I tried search and saw some options on how to extend it and if push comes to shove I will do a MR but want to first see if any other options for their use exists.
thank you