US Treasury Secretary Scott Bessent said on Monday that international airports, ground-handling companies and ticketing agents could face US sanctions if they continue providing services to Iranian airlines. “On September 23rd, all the Iranian airlines will be shut down around the world,” Bessent told CNBC. “If they land, you cannot provide them with fuel, you cannot provide them with landing services, you cannot sell them tickets, or you will be knocked out of the dollar system,” he said.