SDC - Did I miss something?
I was under the belief that if you were in a premium cabin (paid or upgraded with cert or miles ahead of time) that you could change to a flight earlier or later in the same day as long as there was a seat available in the premium cabin of the flight you wanted to switch to.
I used a RUC and cleared a week ago for a flight tomorrow XXX-JFK-SFO. I'm trying to change the XXX-JFK flight to an earlier flight in the day and I called in and have spoken with 4 different DM agents, 3 of which looped in their "Help Desk," and all are saying that even though there are seats available there's no upgrade space, so I'd have to be waitlisted. Is this the way it's always been or should I be able to switch with no problem?