Turkey's Petrol Ofisi, a subsidiary of Vitol Investment Partnership Ltd., refused fuel to Iranian airplanes in Turkey, according to the private Demiroren news agency.
Iran's Mahan Air, ATA Airlines, Qeshm Airlines and Iran Aseman Airlines all operate flights between Tehran and Istanbul.
The United States said on Friday it would temporarily allow eight jurisdictions to keep importing Iranian oil when U.S. sanctions come back into force on Monday, sparing them for now from the threat of U.S. economic penalties.
Turkey depends heavily on imports to meet its energy needs and neighbouring Iran has been one of its main sources of oil because of its proximity, crude quality and favorable price differentials, traders say.
Turkish Energy Minister Fatih Donmez said Turkey, had been told it would get a waiver on the restrictions though U.S. Secretary of State Mike Pompeo has not named the jurisdictions.
The website of Istanbul's Ataturk airport showed at least one flight to Iran had been cancelled, while several others had taken off after being delayed. At least three flights had taken off on time, the website showed.
Turkey's Haberturk daily quoted Petrol Ofisi as saying it had told the carriers that it would not be supplying fuel to Iranian airline companies.
Vitol declined to comment, while Petrol Ofisi could not be reached.
ATA Airlines, an Iranian charter carrier, told the Demiroren news agency that they had to cut the number of passengers on a flight between Istanbul and Tabriz, in northwestern Iran, to 100 from 160 to get extra fuel from Iran.
"It's impossible to carry all passengers unless we can get fuel from both destinations of the flight. Companies would make losses, and it would damage Turkish tourism," said Behzad Atarod, the Istanbul manager of ATA Airlines. (Writing by Ece Toksabay Editing by Richard Balmforth)
(This story has not been edited by Devdiscourse staff and is auto-generated from a syndicated feed.)