Originally Posted by Indianhead
Award ticket- Unused original ticket can be applied to a future flight with the same itinerary or redeposited for a fee, within one year.
Award tickets also have a third option: you can have the ticket reissued for a $100 fee for a different itinerary without redepositing the miles and claiming a new award, assuming that the criteria of the award remain unchanged (for example, which continents are involved, same cabin, etc.)