Delta IS NOT going to probably help as far as not being charged. We had HORRID customer service/ other issues with them, and have not yet even got an appology, and they are avoiding my travel agents calls to resolve a problem that was their mistake. You might can call them and see if maybe they will allow you to save your tickets and apply them for another trip, but you will still have to pay a change fee/price diff if a price diff is there. I know continental allowed me to do this, but as far as Delta well heh we are still fighting with them. Best is just to call them and ask. non refund tickets you wont have luck getting your money back on those.