So I'm flying to NY next week, MSP-ATL-HPN (much cheaper then JFK/LGA), mid day flight as I needed to be in town for the morning. Turns out I dont anymore so i tweeted at delta about SDC rules, specifically regarding if i could change to other NY airports. They said no....unless im a DM? I cant find this as a listed rule anywhere on DL.com.....anyone know anything more about it?