Bessent Hits Iran’s Aviation Sector With Sweeping Sanctions as Treasury Targets 36 Entities and 27 Airlines

WASHINGTON — The Trump administration opened another major front in its economic campaign against Tehran on Tuesday, imposing sweeping sanctions across Iran’s aviation industry and warning foreign banks and companies that continued business with sanctioned Iranian airlines could cost them access to the American financial system.

The Treasury Department’s Office of Foreign Assets Control sanctioned 36 targets, including 27 Iranian airlines, as part of what the administration calls Operation Economic Outcast, an expanding campaign designed to sever the financial, transportation and procurement networks sustaining the Iranian government and Islamic Revolutionary Guard Corps.

The action reaches far beyond airline names on a sanctions list.

Treasury simultaneously targeted foreign intermediaries, cargo companies, aircraft-procurement networks and front businesses accused of helping Iran acquire U.S.-origin aircraft, aviation components and sensitive technology despite longstanding American restrictions. The Financial Crimes Enforcement Network, or FinCEN, also issued an alert urging financial institutions to identify and report suspicious transactions connected to Iranian aviation procurement.

Treasury Secretary Scott Bessent delivered an unusually direct warning to companies still willing to service Iran’s aviation sector.

“Let this be a warning to anyone doing business with Iran’s remaining airlines, all of which we sanctioned today: You are at risk of being cut off from the global financial system.”

The message amounts to more than another round of Washington paperwork. The administration is explicitly putting foreign banks, aviation companies, freight operators and middlemen on notice that helping Iranian carriers could jeopardize their own access to the world’s most important financial market.

Washington Moves Against Iran’s Remaining Airlines

Treasury designated 27 carriers for operating in Iran’s aviation sector, including Iran Aseman Airlines, Iran Air Tour, Kish Airlines, Qeshm Air, Zagros Airlines, Taban Airlines and Sepehran Airlines.

Treasury characterized Tuesday’s action as targeting Iran’s remaining active airlines under authorities established as part of Bessent’s broader August campaign against critical sectors of the Iranian economy.

The administration argues that Iran has repeatedly used ostensibly commercial aviation networks for purposes extending far beyond ordinary passenger travel.

Treasury says the IRGC has relied on airlines to move personnel, weapons and other cargo, while Iranian procurement networks have used front companies and third-country intermediaries to obtain aircraft and technology that would otherwise be unavailable because of U.S. sanctions.

That history has made aviation an increasingly important target in Washington’s attempt to squeeze Tehran financially without relying solely on conventional military pressure.

Mahan Air Network Comes Under Fresh Fire

A significant portion of Tuesday’s action centers on companies accused of supporting Mahan Air, which has been under U.S. counterterrorism sanctions since 2011 over Treasury’s finding that it provided support to the IRGC-Quds Force.

Treasury said companies based outside Iran helped Mahan Air obtain aircraft and maintain international operations despite existing restrictions.

According to Treasury, at least three Boeing 777 aircraft were transferred to Mahan Air during

the summer of 2026 through a network involving businesses in the United Arab Emirates and Türkiye.

The department says the aircraft came from a retired fleet, passed through intermediary companies using temporary registrations and ultimately reached the Iranian carrier through a route resembling previous sanctions-evasion schemes.

Treasury consequently sanctioned companies including UAE-based ECT Aviation Support LLC and Türkiye-based Sky Phoenix, along with associated businesses and individuals.

The action also reaches cargo and sales operations in Türkiye, Malaysia and Kazakhstan that

Treasury says provided services to Mahan Air.

One Turkish logistics business allegedly coordinated shipments that included unmanned aerial vehicle components and industrial equipment destined for Iran, while a Malaysian company allegedly coordinated shipments of U.S.-origin parts.

For the administration, those cases illustrate why merely sanctioning Iranian companies is no longer considered sufficient.

The new strategy aims at the outsiders keeping those companies connected to global commerce.

Three Aviation Authorizations Suspended

Treasury also suspended three Iran-related aviation authorizations, tightening restrictions another step.

Those changes include authorizations that had permitted certain overflights and allowed non-U.S. airlines to fly U.S.-origin or U.S.-controlled commercial aircraft into Iran. Treasury said aviation-safety requests can still be considered individually.

The practical message is increasingly difficult for international aviation companies to ignore: Washington is narrowing the legal and financial channels through which Iran can maintain access to Western aircraft, parts, services and financial infrastructure.

That may prove more consequential over time than the headline number of sanctioned airlines.

Modern commercial aviation depends on an enormous international ecosystem — insurers, banks, aircraft owners, maintenance providers, payment processors, freight companies, parts manufacturers and logistics firms.

Iran does not need every one of those services to be American for U.S. sanctions to exert pressure.

It only needs foreign companies to decide that maintaining access to U.S. markets is more valuable than doing business with Tehran.

Banks Are Now Being Asked to Hunt the Networks

FinCEN’s parallel action adds another dimension.

The agency issued financial institutions with indicators intended to help identify transactions potentially linked to Iranian efforts to acquire aircraft and aircraft components through front companies.

Treasury says Iran has used businesses posing as aviation, technology or logistics companies across Europe, Africa, Asia and the Middle East to disguise the ultimate destination of Western aircraft and dual-use equipment.

Financial institutions are being encouraged to report suspicious activity connected to those networks immediately.

That effectively turns banks into another surveillance layer in the sanctions campaign.

A transaction that appears on paper to involve an ordinary logistics company in a third country may now receive greater scrutiny if its structure, counterparties or payment patterns resemble known Iranian procurement methods.

The administration is therefore moving beyond sanctioning entities after transactions occur and toward disrupting procurement while money is still moving through the financial system.

The Real Weapon Is Access to the Dollar System

The strength of Tuesday’s action lies in what sanctions can do to companies beyond Iran.

Property and interests in property belonging to designated entities that fall under U.S. jurisdiction are blocked. U.S. persons generally cannot conduct transactions involving them unless specifically authorized.

Foreign companies and financial institutions can also face exposure when they knowingly facilitate significant transactions involving sanctioned parties. In certain circumstances, OFAC can restrict a foreign bank’s ability to maintain correspondent or payable-through accounts in the United States.

That threat gives Bessent’s warning considerably more weight.

For an international bank, losing access to the U.S. financial system could be vastly more damaging than losing Iranian business.

For an aviation supplier, the same calculation applies.

The administration appears determined to force that choice repeatedly.

‘Operation Economic Outcast’ Accelerates

Bessent announced Operation Economic Outcast on August 24, describing the broader campaign as an effort to identify and systematically close the financial channels Tehran uses to sell oil, evade restrictions and support the IRGC.

Treasury has since taken additional actions against Iranian financial connections, including sanctions announced September 4 against a Turkish financial institution accused of providing international banking access to Tehran.

Tuesday’s aviation package is among the clearest indications yet that the campaign is intended to be cumulative rather than symbolic.

Oil networks can be targeted.

Banks can be targeted.

Aircraft suppliers can be targeted.

Cargo handlers can be targeted.

And companies outside Iran that keep those networks functioning can find themselves dragged into the sanctions perimeter.

That approach reflects a harder economic doctrine: instead of asking whether a foreign company is Iranian, Washington increasingly appears interested in whether that company is helping Iran remain connected to the international system.

Tehran Pushes Back

Iran has rejected the expanding American sanctions campaign.

Iranian Foreign Minister Abbas Araghchi has questioned the effectiveness of the measures and argued that Washington’s sanctions policies have damaged America’s international standing.

The effectiveness of the latest restrictions will ultimately depend on enforcement, foreign compliance and Tehran’s ability to develop new sanctions-evasion networks.

Iran has spent years adapting to Western financial restrictions and has repeatedly turned to intermediaries, opaque ownership structures and third-country trade routes to maintain access to goods and capital.

But every additional restriction raises the cost of doing so.

And Tuesday’s action is designed specifically to make the companies helping Iran carry some of that cost themselves.

Bessent’s Warning Leaves Little Ambiguity

The most consequential part of Tuesday’s announcement may ultimately be the simplest.

Washington is no longer addressing its warning only to Tehran.

It is addressing anyone willing to help Tehran.

The Trump administration is betting that banks, aviation companies and international suppliers faced with a choice between Iranian business and continued access to the U.S. financial system will overwhelmingly choose the latter.

Twenty-seven Iranian airlines are now directly caught in that strategy.

Thirty-six targets were hit in a single day.

Foreign procurement networks are under expanded scrutiny.

Banks have been instructed to look for the money trails.

And Treasury has made clear that the aviation action is part of a broader campaign, not its conclusion.

For Tehran, the problem is therefore no longer simply another sanctions list.

Washington is attempting to make Iran increasingly expensive — and increasingly dangerous — for the rest of the commercial world to touch.