The U.S. Treasury chief has announced that all Iranian airlines are expected to shut down their worldwide operations and international flights by September 23. This measure is part of Washington's intensifying economic and financial sanctions targeting Iran's aviation sector. According to official statements, these international restrictions aim to curtail Iran's external operational capabilities and disrupt strategic transportation networks associated with the government, exerting direct pressure on the country's economy. Analysts note that grounding international flights will deal a heavy blow to Iran's tourism and foreign trade sectors, further deepening the nation's economic isolation. [US Treasury](https://example.com)