Originally Posted by
cre95
When there are no more D1 seats for the upcoming flight, it's your choice to let them know you want to be on the follow-on flight. It'll come down to how long you'll want to wait to be in D1 versus taking the next available flight in Y. All you need to say is that you have D1 seats are are fine with waiting for a later flight.
Plus there's lots of no shows for these flights because of the generous SDC policy.
If every other flight was completely sold out, you would bet I would get to the gate, ask for a Red Coat, let them know I'm Diamond on a paid D1 ticket, and if anyone no shows or doesn't check in, to make sure the Red Coat clears me into that seat instead of a complimentary upgrade!