US Extends Iran Blockade to Skies — And China Isn't Bending
Washington is outlawing third-country support for Iranian flights, turning skies into a sanctions front line. Iran's economy was already buckling; now even the air routes to Iraq and the Gulf are closing. Beijing and Moscow are staying airborne.
The Sky Is No Longer a Neutral Space
On September 23, the United States declared war on Iranian air routes. Not with missiles — with paperwork. The Treasury Department added Mahan Air, Iran’s largest civilian carrier, and 27 smaller operators to its sanctions list, then issued a blunt warning to every airport, fuel supplier, and travel agency outside America: service these airlines and you lose access to the dollar system.
Scott Bessent, the Treasury secretary, made it explicit on CNBC. Iranian planes cannot refuel on your tarmac. They cannot sell tickets through your agency. Cross that line and the US will cut you off from dollar clearing — the financial equivalent of exile for any international business.
This is the second-degree boycott in its most aggressive form yet, layered on top of an already suffocating maritime blockade that has been strangling Iranian cargo exports for months. The message from Washington is unambiguous: Iran cannot move by sea, and now it cannot move by air either.
Who Loses First — And Where the Pain Shows Up
Iran’s economy was already reeling before this announcement. Inflation is rampant. The rial has lost ground again. Medicine and auto parts — the two categories most dependent on air freight — are growing scarce. Now the shortage mechanism has a new pipeline to shut off.
Within hours of the sanctions taking effect, Iran’s civil aviation authority confirmed the cancellation of all flights to Baghdad and Muscat. Azerbaijan banned every Iranian airline from its airports. Georgia said it had already grounded all flights to Iran as of September 21. Mahan Air notified customers that flights to Turkey and Oman were being suspended at those governments’ request.
Dubai remains the only notable exception — Iranian flights are still operating there as of September 22 — but no one in the UAE wants a visit from US enforcement officials. The durability of that route is a question mark, not a guarantee.
Matthew Levitt, a senior fellow at the Washington Institute for Near East Policy, told the Wall Street Journal that if the world complies, Iranian carriers will be confined to domestic routes. That is not a threat. That is a forecast based on what is already happening.
The Non-Obvious Angle: China and Russia Are Flying Anyway
Here is what the sanitized Washington narrative is missing. The two countries most capable of keeping Iranian airspace open — China and Russia — are doing exactly that.
Flight radar data from FlightRadar24 shows Mahan Air still operating flights to Moscow and Guangzhou through the evening of September 22, well after the sanctions took effect. China’s foreign ministry issued a statement the same day calling Sino-Iranian cooperation “just and legitimate,” framed in terms of mutual respect and mutual benefit. Translation: we are not complying.
Levitt himself noted that China, Russia, and Iran are actively working to undermine the US unilateral sanctions regime. This is not covert resistance. It is open defiance, conducted through scheduled commercial flights.
Why does this matter beyond Tehran? Because China sees Iran as a hinge state in its Belt and Road corridor through the Middle East. Russia sees it as a partner that can absorb Western pressure without breaking. Neither country is interested in letting American secondary sanctions redraw the map of regional trade.
The US is betting that economic pain will force Iran to the negotiating table before a November deadline Trump has floated for ending the conflict. Beijing and Moscow are betting that the same pain will push Iran deeper into their orbit — which is exactly what the sanctions are designed to prevent.
The Energy Question Nobody Is Asking Loudly Enough
Iran’s seaports have been the primary choke point. Land routes through Iraq and Turkey are congested and slow. Air freight has been the pressure valve — small volume, high value, essential goods that cannot wait for a truck or a ship. Closing that valve does not just inconvenience Iranians. It tightens the global supply chain at a moment when markets are already pricing in volatility over Middle East energy flows.
Any disruption to Iranian commerce funnels through alternatives that are themselves constrained: the Strait of Hormuz, overland routes through Central Asia, or the China-Pakistan Economic Corridor. None of those are empty. All of them carry their own geopolitical risks.
If Iran’s economy contracts further under the weight of dual sea-and-air sanctions, the question becomes whether the regime absorbs the pain or exports it. The latter option is why defense analysts have been tracking Iran’s carrier-killer missile capabilities with growing alarm. A besieged state with something to prove is a different kind of risk than one that is simply sanctioned.
What Comes Next
The immediate picture is clear: Iranian airlines are grounding regional routes. Medical supplies and spare parts will become harder to import. The rial will weaken further. Ordinary Iranians will feel it first.
The longer-term picture is less certain. China and Russia are signaling that they will not enforce US secondary sanctions on Iran, which means a parallel trade corridor will persist — smaller, riskier, more expensive, but functional. That corridor is the fault line where this confrontation will play out over the coming months.
Trump’s administration is pushing for a pre-November settlement. Every sanctioned flight that never lands is a card in that negotiation. But the cards are being played on a board where Beijing and Moscow still have pieces moving, and where the threat of asymmetric escalation is no longer theoretical.
The sky over Iran is closing. But the players who refuse to look down are still flying.