CarolA is right. For $50 you can redeposit the miles into your account. This is very simple and much faster to do online. You can also do nothing. (Just keep the confimation number.) When you want to reschedule, log into your account, then you can "change your flight" for $50. I recently used option 2 in April, simply because I didn't want to pay the $50 to put miles back into my account if Delta was going to cease to exist after 4/15. Now that they (supposedly) are good until 2009, I rebooked my ticket for December. IMHO - SWA is #1, Delta is just a backup.