Originally Posted by
findark
Yes, same rules for international flights.
Generally yes, but some DL widebody international aircraft currently have premium economy but not C+.
Also, IIRC southern South America flights had been treated differently and continuing to permit C+ access by paying just the seat fee, with elites being able to pick these seats themselves since C+ wasn't treated as a separate cabin class on these routes. I don't know whether this has changed recently to mirror how C+ is handled on other routes.