Baghdad and Muscat will stop accepting flights from Iran at midnight local time today. Iranian authorities are scrambling to redirect Baghdad-bound traffic to Najaf instead, and negotiating with Oman over alternatives. It’s a visible consequence of a new US sanctions mechanism that took effect today, and it targets a different part of Iran’s aviation problem than the one we covered earlier this month.
Our piece on Rolls-Royce Trent engine parts explained how Mahan Air keeps its smuggled 777s and A340-600s flying — front companies, temporary registrations, a black-market parts network built on Iran Air’s legitimately acquired Trent fleet. That’s the maintenance half of the story. This is the other half: even a well-maintained aircraft is worthless if fewer places remain to fly them legally.
How the New Mechanism Works
The US doesn’t have authority to close foreign airspace directly. It can, however, threaten the service providers on the ground. Treasury Secretary Scott Bessent announced that, starting today, any foreign airport, fuel supplier, ground-handling firm, or ticketing agent that continues serving sanctioned Iranian airlines risks losing access to the US financial system entirely. That’s a far broader lever than sanctioning the airlines themselves — it reaches every airport and vendor Iran’s carriers depend on abroad, regardless of that country’s own relationship with Washington.
The Effects Are Already Visible, Not Theoretical
Mahan Air lost service to Turkey and Georgia. Oman forced Mahan’s Muscat route to stop even earlier, on September 17, ahead of today’s broader deadline. Azerbaijan suspended flights by the Iranian carrier immediately. Iraq is separately moving to suspend all US-sanctioned Iranian airlines outright. This isn’t a policy announcement waiting to bite — airports and airlines are already responding to it.
Why Baghdad and Muscat Specifically Matter
Iraq isn’t just another neighboring market for Iran. Najaf and Karbala are major Shiite pilgrimage sites, and travel between the two countries spikes sharply around religious occasions, especially the annual Arbaeen pilgrimage, which draws millions of travelers. This isn’t purely a commercial aviation story — the disruption falls directly on ordinary pilgrims and families trying to reach relatives, not just on the sanctioned carriers themselves.
One Precise Distinction
This is not a total shutdown yet, and treating it as one would overstate what’s actually happened. Iran Air says it has not been informed of any blanket ban. Mahan Air stressed that the suspension of its specific routes doesn’t mean Iranian airspace is closed or that every Iranian carrier has stopped flying everywhere nearby — Istanbul service, notably, continues as scheduled. The accurate framing is a rapidly tightening net, airport by airport and route by route, not an instantaneous, complete grounding.
Why This Matters More Than Another Round of Sanctions
Our earlier reporting showed that Iran’s aviation sector has proven resilient against financial and parts-supply sanctions — front companies, oil-for-parts barter, a documented pipeline of at least 66 illegitimate aircraft arriving since 2015. Sanctions on money and parts have a workaround, expensive and degraded, but real. Sanctions on physical infrastructure access are a different kind of pressure entirely. A front company can still source a black-market engine part. It can’t manufacture a foreign airport’s willingness to let an aircraft land, refuel, and depart. This wave of measures targets the one input in the chain that can’t be smuggled.
Bottom Line
Seven months into the conflict between the US and Iran, the aviation sanctions campaign has moved from squeezing Iran’s ability to maintain aircraft to squeezing its ability to use them internationally. Mahan Air’s fleet of smuggled Boeing 777s and Airbus A340-600s, kept alive through Rolls-Royce Trent parts networks we detailed earlier this month, still runs into the same problem it always has — an aging, degraded fleet held together by expensive workarounds. Now it also has fewer and fewer places abroad willing to let it land.
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