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Treasury says every Iranian airline will be grounded worldwide from Wednesday

Scott Bessent says secondary sanctions will shut Iranian carriers out of the global aviation system from 23 September.

Assembled by Claude from 7 sources at 7 outlets · Tuesday, September 22, 2026, Morning edition, 10:20 AM EDT · no human byline

Disclosure. This item was assembled by an AI from the RSS excerpts of the outlets tagged inline. No human wrote or checked it before publication. Feed selection and categories are editorial choices by Teresa Lo. Nothing here is investment advice.

What happened

All Iranian airlines will be shut down from 23 September, Treasury Secretary Scott Bessent told CNBC cnbc.com. The Straits Times and The Hindu both reported the same statement, that the US Treasury chief says Iran's airlines are to be shut down on that date straitstimes.comthehindu.com.

The mechanism is secondary sanctions. The Treasury is moving to impose them on companies that assist Iran's airlines jpost.com, and on foreign companies that continue servicing Iranian carriers middleeasteye.net. The Treasury Department also took aim at targets for supporting the sector thehindu.com. The National set out what that would mean in practice: Iranian carriers could be cut off from access to landing facilities, refuelling and ticket sales thenationalnews.com.

The announcement lands inside an active war. The United States and Iran have been at war since late February, when US and Israeli strikes killed the Islamic republic's supreme leader and senior military officials at the start of a broad offensive straitstimes.comthehindu.com.

The claim is contested

Iran says nothing has stopped. Its Civil Aviation Organisation said no foreign flights had been cancelled despite the US sanctions threat, and that no instructions had been issued middleeasteye.net. China said it opposes what it called illegal unilateral sanctions as Washington moves to impose sweeping secondary measures targeting Iran's carriers aa.com.tr. The gap between an announced shutdown and an observed one is the whole story here cnbc.commiddleeasteye.net.

Why it matters to investors

Secondary sanctions do their work on third parties, not on the target. The exposure sits with the service providers named in The National's list: airports granting landing rights, fuel suppliers, ground handlers and ticketing and distribution systems, most of them outside Iran and many of them listed companies thenationalnews.commiddleeasteye.net.

Aircraft lessors and aviation insurers face the same question in a harder form, because a carrier cut off from refuelling and landing facilities is a carrier whose fleet stops earning thenationalnews.com. Ticket sales and distribution are the softest link in that chain and the easiest to sever, since the systems that sell seats are concentrated in a handful of companies with US exposure thenationalnews.com.

Timing is the other variable. This is a measure announced days in advance rather than imposed without warning, which gives counterparties a window to withdraw service voluntarily and gives Tehran a window to contest the claim publicly, as its aviation authority has already done cnbc.commiddleeasteye.net.

Watch three things. Whether flights actually stop on Wednesday, against Tehran's claim that no cancellations have occurred cnbc.commiddleeasteye.net. Whether the Treasury publishes the designations rather than only threatening them jpost.com. And whether Chinese objections translate into Chinese non-compliance, which is what would turn a sanctions programme into a test of enforcement reach aa.com.tr.

Sources

  1. cnbc.com: All Iranian airlines to be 'shut down' from Wednesday, Bessent tells CNBC (2026-09-22)
  2. straitstimes.com: US Treasury chief says Iran airlines to be 'shut down' on Sept 23 | The Straits Times (2026-09-22)
  3. thehindu.com: U.S. Treasury chief says Iran airlines to be 'shut down' on September 23 - The Hindu (2026-09-21)
  4. jpost.com: US Treasury to impose secondary sanctions on companies assisting Iran's airlines (2026-09-21)
  5. thenationalnews.com: US sanctions threat puts future of Iranian airlines in question | The National (2026-09-22)
  6. middleeasteye.net: Iran says no foreign flights cancelled despite US sanctions threat | Middle East Eye (2026-09-22)
  7. aa.com.tr: China says opposes 'illegal unilateral sanctions' as US pressures Iran with secondary sanctions (2026-09-22)