The US Treasury will block all fuel, landing, and ticketing services for Iranian air carriers starting Sept 23 to isolate Tehran's aviation network. Treasury Secretary Scott Bessent announced the global shutdown as part of Operation Economic Outcast, threatening to remove non compliant providers from the US dollar system. The measure follows the Sept 8 revocation of licenses that let foreign airlines operate Iranian aircraft, which triggered a 15 day wind down period.

Iraq banned Iranian aircraft from all national airports at midnight Tuesday, citing compliance with the American restrictions. The Iranian Civil Aviation Organization subsequently suspended flights to Baghdad and Muscat, while Turkish Airlines cut routes to Iran until March 2027 due to sanctions on US components in Airbus planes. Chinese authorities described the unilateral measures as illegal, but Iran stated foreign flights would resume in October.