I booked SEA-IAD-CHS for 5/8 on a W fare and applied an RPU. IAD-CHS on a CR7 instantly cleared. but SEA-IAD did not.
I know my original W fare must still be available in order to downgrade myself so I'm wondering GENERALLY when is the latest I can safely remove an RPU?
Ideally, I'd like to wait til the morning of the flight and see where I am on the upgrade list or even wait til boarding or after the first flight. My fear is the CR7 will fill up.