Do you have a specific region in mind? Your best bet is to look for one way rewards on partners to one of their hubs to get you close to where you want to go. Then either buy a ticket to your final desired locale or get lucky and find a good Delta CSR that can add a leg on a partner flight without making it additive. If a partner flies to that destination and has low level availability. It takes time, patience, and a whole lot of flexibility. A couple stress balls are recommended as well. It also helps tremendously if you are platinum or higher with Delta since then you can lock in trips, but continue to look and change for no fee if something better comes along.