Originally Posted by
Deltahater
Good luck with that one. AA eliminated the downfaring a while back, so I doubt they will do it on awards now.
You could cancel your trip, redeposit the miles for a fee and rebook yourself. Of course that means you lose your seat, availability might be an issue, etc...
Best thing to do would be to put a new one-way on hold, cancel the R/T (paying the redeposit fee), then pull the trigger on the one way, pick up your reserved seat when it is returned to inventory.