I saw that UA SDC or SDS is for free Gold Primier member.
I have a question. Is it same policy with Delta for SDS(Same Day Standby)? That meaning is SDS is original routing only eligiable. For example, my N class(very lower class) ticket from Boston to Dallas, TX(DFW) via EWR original routing, is it possible to get on stand by different routing from Boston to Dallas(DFW) via ORD, IAD, IAH etc? I am sure there is not available for same fare class within 24 hours.