I booked business award travel using United Plan B. The domestic segment has cleared but the international has not. Do I do online check in first, then go to the airport to get PR1 status? I understand that PR1 status can be granted starting at 24 hours before the flight. Do I have to wait until 24 hours before the international segment or 24 hours before my first segment which has cleared? Has anyone tried this in SAN? If so, was there an agent that was more knowledgeable of the procedure than others?