U.S. pressure campaign on Iran: sanctions, flight bans and banking cuts

U.S. sanctions grounded all remaining Iranian airlines on September 8, 2026, cutting off the country's access to international aviation technology and commercial flight routes [1]. The Department of the Treasury designated 36 targets under "Operation Economic Outcast" to block front companies and transshipment routes used by Iran to acquire U.S.-origin aircraft parts [1]. These measures also suspended three specific aviation authorizations previously granted to Iran [1]. The Treasury is now targeting third-country firms providing cargo services and aircraft procurement for Mahan Air to enforce these restrictions [16].

Financial restrictions have expanded to target international banks facilitating Iranian transactions in the Middle East and Asia [4][5]. The U.S. sanctioned Turkey’s Golden Global Bank and two subsidiaries on September 4 for moving funds for the Islamic Revolutionary Guard Corps (IRGC) [5]. Additionally, FinCEN proposed a rule to strip Banque Misr UAE of its correspondent banking access, identifying the institution as a primary channel for Iranian access to U.S. dollars [4]. On September 16, 2026, FinCEN met with global financial institutions to coordinate the isolation of Iranian revenue streams and procurement networks [14].

The U.S. Treasury expanded secondary sanctions on August 24, 2026, to include the digital asset, technology, gold, aviation, and shipping sectors [15]. Under this authority, the Office of Foreign Assets Control (OFAC) sanctioned nearly 60 entities [18]. Earlier actions on August 7 targeted two major digital asset exchanges and a network of front companies used by the IRGC to launder funds through online gambling and shadow banking [13].

Future U.S. Treasury actions will focus on identifying new entities or individuals involved in bypassing current aviation and banking restrictions [1]. The Federal Aviation Administration (FAA) maintains a standing prohibition on U.S. flight operations within the Tehran Flight Information Region, which remains subject to periodic safety reviews [7][8].

International financial institutions face continued scrutiny following accusations of links to Iranian financial activity earlier this year [9]. Middle Eastern banks face increased pressure from U.S. officials to close evasion channels, which may lead to the termination of U.S. correspondent banking relationships [17]. The Iranian Ministry of Foreign Affairs typically issues official statements in response to new U.S. economic measures, which serve as the primary diplomatic record of the government's position on these sanctions [11][12].