Hi, Pjiang,
My parents' B-2 extension was denied a few days ago. They plan to go back to China within 30 days from the date the denial letter was issued. However, they plan to go to Las Vegas before they leave and I have already bought the flight tickets. Do you know if they will have any problem at the airport when they check in for the domestic flight to Las Vegas? Thank you very much and I look forward to your reply.