Originally Posted by
MSPeconomist
The T&Cs say 48 hours IIRC for redeemable miles, GUCs/RUCs, and vouchers, but IME it's never been more than a couple hours and phone agents might be able to see this stuff and apply it even faster.
Agents won't see them till a day after they posted . I've never had RUC/GUC take more than a few minutes to post. Then I simply give the number to the agent to use.