Iranian Airlines Grounded Worldwide: An Aviation Analysis
As of today, Iranian airlines are, in effect, locked out of international aviation.
On 21 September, US Treasury Secretary Scott Bessent said all Iranian airlines would be "shut down around the world" from 23 September. The US cannot close foreign airspace. What it has done is warn that any company providing fuel, landing services or ticket sales to Iranian carriers could be cut off from the US dollar system.
For an industry that depends on fuel suppliers, ground handlers, GDS systems and dollar payments, that is a very effective way to ground an airline.
How we got here
Late February 2026: US-Israel strikes on Iran closed Iranian airspace completely. Flights resumed later, but only partly.
8 September 2026: The US OFAC sanctioned all 27 Iranian airlines, including Iran Aseman, Qeshm Air, Zagros, Taban and Kish Air. Mahan Air has been under sanctions since 2011.
Also on 8 September: OFAC suspended authorisations that allowed non-US airlines to fly US-built or US-controlled aircraft into Iran. Almost every widebody has US content, so this quietly affects foreign carriers too.
Mid-September: Mahan Air suspended flights to Istanbul, Ankara and Muscat. Iraq and Georgia moved to stop Iranian carriers.
Who flies where today
Mahan Air: The largest international network, covering China, India, Iraq, Pakistan, Thailand and the UAE.
Iran Air: Once flew widely in Europe. Now only about three international destinations remain: Najaf, Baghdad and Istanbul.
Qeshm Air: Flies to Turkey, Iraq, the UAE and Germany.
The foreign airports most exposed are Istanbul, Najaf, Baghdad, Dubai, New Delhi, Lahore, several Chinese cities and Phuket.
The numbers that matter
11.2 million international passengers flew to and from Iran in 2025.
About 7.2 million of them flew on Iranian carriers.
49% was the drop in Iran's international seat capacity in August 2026 compared with 2025.
Up to 100% is how much some fares have risen in recent weeks.
About one-third of Iran's operational fleet could be grounded quickly, according to one analyst estimate.
TraviationX analysis: what this means for airlines
1. Demand does not disappear, it reroutes.
Around 7 million passengers a year need another way to travel: pilgrims going to Iraq, families visiting the diaspora, and traders. Expect more connecting traffic through Istanbul, Doha, Muscat and Dubai, and more land crossings into Turkey, Iraq, Armenia and Pakistan.
2. The biggest question is compliance, not capacity.
Can foreign airlines keep flying to Iran without risk? Until this is clear, most network planners will stay away. That leaves the demand shift on paper rather than in bookings, and it keeps fares high.
3. Forecasting models need a reset.
For revenue management and network teams, O&D data from before February 2026 is now a poor guide to the future. Useful approaches include:
Treat 2026 Iran-linked data as a structural break, not normal seasonality.
Build scenarios, such as "foreign carriers allowed", "partial exemptions (Iraq, Turkey)" and "full cut-off".
Watch leading signals, like government statements, airport notices and competitor schedule filings, rather than past trends.
4. Airspace is the hidden risk.
Iran could respond by closing its airspace to foreign carriers. Some airlines, such as flydubai, had started using eastern Iranian airspace again to save flight time. A closure would mean longer block times, more fuel burn and tighter aircraft rotations on Gulf–Asia routes.
5. Maintenance and safety.
Iranian fleets are already old because of decades of sanctions. Cutting off services abroad makes parts and maintenance even harder, which is a safety concern for passengers who still have no other option.
Will the world comply?
The ban is only as "worldwide" as the countries that enforce it:
Likely to follow: The UAE, which has already said it is halting trade with Iran, and Georgia.
Likely to seek exemptions: Iraq, because of religious tourism income.
Likely to resist: China, which has called the measures illegal, Russia, Pakistan and possibly Turkey.
The bigger picture
On its own, grounding Iranian airlines has a small effect on global aviation. The wider conflict, through oil prices, airspace closures and Strait of Hormuz disruption, matters much more to airline costs worldwide. The human cost falls mainly on ordinary Iranian travellers, who face fewer choices and much higher fares while household incomes are falling.
Key takeaways
The US is grounding Iranian airlines through secondary sanctions, not a direct ban.
About 7 million yearly passengers on Iranian carriers will shift to other hubs or to land routes.
Whether foreign carriers can fly to Iran is the deciding question.
Airline planners should switch from trend-based forecasting to scenario planning.
Airspace retaliation is the main risk for Gulf and Asia operations.