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US Iran Aviation Sanctions Threaten Global Airline Grounding Wednesday — AI-generated representative image: A passenger airliner sits idle on an airport tarmac, reflecting the threat of international grounding facing Iranian carriers

Editorial Team

Treasury Secretary Scott Bessent warns airports and service providers risk losing dollar access over Iranian carrier support

United States Treasury Secretary Scott Bessent has warned that Iranian airlines could effectively be shut out of international travel from Wednesday, September 23, as Washington threatens foreign companies with secondary sanctions if they continue servicing the country's carriers.

Speaking to CNBC on Monday, Bessent said the warning extends beyond the airlines themselves to airports, fuel suppliers, ticketing companies and other businesses that Iranian carriers rely on to operate abroad.

The threat represents the latest escalation in the Trump administration's economic pressure campaign against Tehran, which has continued alongside the war between the United States and Iran. The move matters because it targets the global infrastructure that keeps Iranian aviation running, rather than only the airlines themselves.

Foreign businesses that continue to serve Iranian carriers now face the prospect of being cut off from the US dollar system, a consequence with potentially severe implications for their operations worldwide.

Escalating Aviation Sanctions

Bessent outlined the scope of the enforcement threat in direct terms. "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.

Earlier this month, the US Treasury imposed sanctions on all remaining Iranian airlines that had not already been targeted, along with companies outside Iran accused of supporting the country's aviation sector. These measures sit within a much broader sanctions regime aimed at isolating Iran from the international financial system.

Years of Aviation Restrictions

Iran's aviation industry was already heavily constrained by years of US sanctions, which have made it difficult for carriers to purchase new aircraft and obtain spare parts and maintenance services. The new enforcement push threatens to deepen that isolation by targeting the foreign partners that enable Iranian flights to operate internationally.

US secondary sanctions already threaten foreign companies doing business with Iran across sectors including energy, shipping, technology, gold and digital assets. The aviation measures extend this approach to the companies that fuel, service and ticket Iranian flights.

China's Role in Enforcement

Bessent's comments came a day after talks with Chinese Vice Premier He Lifeng, ahead of President Trump's meeting with Chinese President Xi Jinping on Thursday. China is one of Iran's most important economic partners and diplomatic backers, making Beijing's cooperation potentially significant to Washington's efforts to financially isolate Tehran.

Bessent said Chinese officials had been "very engaged" in the US pressure campaign. He described Washington's talks with Chinese financial authorities, including People's Bank of China Governor Pan Gongsheng, as positive and focused on compliance with US sanctions on Iran.

What Happens Next

The September 23 deadline marks the point at which the Treasury's enforcement threat is set to take effect. Whether the full grounding of Iranian airlines materializes will depend on how foreign airports and aviation companies respond to the risk of losing access to the US dollar system. Further clarity is expected to emerge as the deadline approaches and as US-China discussions on sanctions compliance continue.