Speculations are growing that global aviation giants Boeing and Airbus could lose $39 billion in lost contracts as a result of sanctions against Iran promised by US President Donald Trump.

The US Treasury says licenses for Boeing and Airbus to sell passenger jets to Iran will be revoked following Washington's withdrawal from the nuclear deal.

Air France says it plans to cut back on the number of its flights from Paris to Tehran from October.

Tehran has ordered more than 200 planes since US-led sanctions against the country were lifted in 2016 under a nuclear agreement.

Iran Air has signed an agreement with an unnamed Chinese company over the funding of its plane purchase campaigns from Airbus and Boeing.

According to Russian Energy Minister Alexander Novak, bilateral trade in 2017 stood at $1.7 billion, but “there are still unresolved issues”.

Iran took delivery of the first four ATR aircraft in May and two more in September, with the rest due to be handed over to the country by the end of 2018.

Iran has played down recent US threats against its plane purchase campaigns from global aviation giants and says it expects the purchases to move ahead smoothly as a funding mechanism for purchases is being worked out.

Iran's Deputy Minister of Roads and Urban Development Asghar Fakhrieh Kashan says a recent US bill to monitor sales of planes to Iran is meant to either deter financers or trace and confiscate Tehran’s payments for plane purchases.

Donald Trump’s administration is considering plans to stop Boeing and Airbus from selling airplanes to Iran, a report says.