US Treasury Secretary Scott Bessent has warned that businesses working with sanctioned Iranian airlines risk facing US sanctions.

In a post on X, Bessent described the warning as part of a campaign to apply economic pressure on Iran during the ongoing war.

"Doing business with sanctioned Iranian airlines risks exposure to US sanctions," he stated.

Bessent called on foreign governments to take "all actions necessary" to ensure that companies in their jurisdictions do not provide services to those aircraft.

This includes the provision of jet fuel, catering, landing fees, or maintenance.

"The Treasury will impose maximum pressure on Iran and will not hesitate to act against any third parties that facilitate or conduct business with Iranian entities," Bessent said in a statement.

Flights resume from Tehran

The warning comes as Iran resumed some commercial flights since the start of the US-Israel War with Tehran.

Iran's state-run television announced that several flights took off from Tehran on Saturday.

The Iranian Civil Aviation Organisation previously announced the reopening of parts of its airspace, specifically noting that international transit routes in the eastern portion of the country are now open.

US Treasury Department recently launched "Economic Fury," a programme utilising the agency's financial power to combat Iran by targeting global assets linked to the oil trade.

As part of this initiative, the US sent letters to Chinese banks, threatening secondary sanctions if they continue to facilitate Iranian oil transactions.

Bessent reaffirmed that the US will maintain its "maximum pressure" policy to combat Iranian influence.