U.S. Tightens Pressure on Iranian Airlines’ Service Providers

Starting Wednesday, September 23, 2026, the United States will increase pressure on international service providers to cease operations with Iranian airlines. Treasury Secretary Scott Bessent announced that airports, fuel suppliers, and ticket sellers face secondary sanctions if they continue to support Iranian carriers. This move is intended to shut down Iranian airlines globally by cutting off their essential services.

The U.S. strategy targets the companies that enable Iranian airlines to operate, rather than imposing a direct ban by every country. However, it could significantly hinder international flights by putting foreign service providers at risk of losing access to U.S. financial systems. This action follows earlier sanctions announced on September 8, which targeted 27 Iranian airlines and related aviation entities.

Understanding the Secondary Sanctions

The core of this new pressure campaign relies on secondary sanctions. These sanctions can affect businesses outside of Iran, even if their home governments have not prohibited dealings with Iranian carriers. Airports, fuel providers, and ticketing companies could face financial penalties if they continue to serve Iranian airlines. This gives Washington leverage over firms operating in countries that have not yet grounded Iranian flights.

The U.S. Treasury Department stated that it will continue to coordinate with international partners to prevent the Iranian regime from using economic resources to support its agenda. The approach combines direct sanctions on Iranian aviation entities with pressure on third-country businesses involved in aircraft support and civilian aviation procurement.

Key Deadlines and Measures

The U.S. has established a series of deadlines and measures to implement this pressure campaign. On September 8, 2026, sanctions were announced targeting 27 Iranian airlines and related entities. Following this, General License J-1 and other aviation authorizations covering civil aircraft transactions and transit arrangements were suspended.

A specific deadline was set for September 23, 2026, at 12:01 a.m. EDT, for wind-down transactions under General License DD. This date also marks the warning for a global service cutoff, pressuring airports, fuel suppliers, and ticket sellers to stop serving Iranian carriers. Companies that provide landing services, fuel, or ticket sales risk losing access to the U.S. dollar financial system if they continue to support these airlines.

Impact on Airlines and Passengers

The pressure campaign has already begun to affect airline operations. Mahan Air, for instance, started suspending international services following the initial sanctions announcement. This led to the cancellation of routes to Oman, Türkiye, and Georgia. The Tehran-Muscat service ended on September 17, 2026, and flights to Istanbul and Ankara were scheduled to stop by September 21, 2026. Flights by sanctioned Iranian carriers to Georgia were also expected to cease from September 21, 2026.

These route changes demonstrate how the pressure can impact passengers even before the broader deadline. As access to airports and supporting services narrows, flights become more difficult to maintain. The measures also carry consequences for airlines that rely on transit arrangements, fuel contracts, and local ticket sales, as each lost service can sever a connection.

International Reactions and Cooperation

U.S. Treasury Secretary Scott Bessent highlighted discussions with Chinese Vice Premier He Lifeng, indicating that Chinese financial authorities were engaged in discussions about compliance with U.S. sanctions on Iran. The Treasury Department spokesman mentioned ongoing coordination with other governments and thanked Oman and Turkey for taking steps against Iranian airline operations.

Iranian officials and institutions have rejected the international cooperation behind these restrictions. A statement from the Khatam al-Anbiya Central Headquarters criticized the U.S. for resuming measures against Iran with the support of some regional countries. Iranian diplomat Seyed Ali Mojani also criticized Georgia for joining the pressure campaign, accusing Tbilisi of making decisions to please America.

The approaching deadline on September 23, 2026, presents companies handling fuel, airport services, or ticket sales for Iranian carriers with a critical choice. They must decide whether to continue servicing these airlines or risk exclusion from the global financial system that underpins their international business operations.

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