Originally Posted by
mattp1987
That's not what it says on the post I copied from airfrance.us and that you quoted. I quoted myself below and bolded the applicable parts.
Additionally, for the question about the lounge at IAH, I have used it when flying United by showing my PP card. I'm not a SC member, so I don't know if a SC card would work there.
Most UA lounges are part of PP (but not PP Select). PP rules require only some flight that day, not a departure and not a flight associated with the airline that operates the lounge.