The United States Treasury Department announced sweeping new sanctions against Iran's aviation industry on Tuesday, targeting 36 commercial and private airlines as well as foreign cargo service providers, in the latest move under what Washington has dubbed "Operation Economic Outcast." Treasury Secretary Scott Bessent framed the action as a direct warning to any country or company still doing business with Iranian carriers. "You are at risk of being cut off from the global financial system," he said.

At the centre of the new measures is Mahan Air, Iran's largest privately owned airline, which flies from Tehran to dozens of destinations across Asia, Europe and the Middle East. Mahan Air has been under US sanctions since 2011, when the Obama administration accused it of transporting weapons to Iranian-backed armed groups in Lebanon and Yemen. The new package expands those penalties and extends them to the entirety of Iran's remaining aviation ecosystem. Washington also accused private entities in Turkey, the United Arab Emirates, Kazakhstan and Malaysia of supplying Mahan Air with aircraft parts and logistics services, exposing those firms to secondary sanctions — meaning that any assets held under US jurisdiction could be frozen.

The aviation sanctions are part of a broader two-pronged strategy of military pressure and economic strangulation that the Trump administration has pursued since the US and Israel launched a war against Iran in late February 2026, a conflict that passed the six-month mark in August without a resolution in sight. In recent weeks, the US struck Iranian oil tankers and announced penalties against a Turkish bank accused of helping Iran convert oil revenues — largely from China — into cash and gold. Trump has compared the overall economic campaign to an "economic D-Day," while Bessent has called it the "toughest sanctions in history." The Strait of Hormuz, the narrow waterway through which a significant share of the world's oil passes, has remained a flashpoint: Iran restricted passage through the strait early in the conflict, causing fuel prices to spike globally, prompting the US to impose its own naval blockade.

Tehran has dismissed the new measures as a sign of American failure rather than strength. Iranian Foreign Minister Abbas Araghchi wrote on social media that the sanctions fallout "has been disastrous for America, including its standing worldwide," sarcastically asking: "After failing to achieve its aims through sanctions or war, Washington's 'novel' solution is… more sanctions. Seriously?"

The broadening of sanctions to cover virtually all of Iran's commercial aviation underscores Washington's determination to close any remaining gaps in its economic containment strategy. However, the administration faces a delicate balancing act: officials have acknowledged the need to sever Iran's financial networks without causing collateral damage to the global financial system, a concern that led them to stop short of full sanctions against an Egyptian bank operating in the UAE last month. With the war continuing and fuel prices hitting record highs in the United States over the Labor Day weekend, the pressure is mounting on both sides to find an off-ramp — though neither appears close to one.