Iran's Foreign Ministry says Iranian planes are getting fuel at airports around the world, contrary to reports that some countries are refusing supplies.
A ministry spokesperson told a news conference the reports are part of a propaganda war against the Islamic Republic.
The secretary of the Iranian Airlines Union had been quoted on Iran's ISNA news agency as saying that Iranian planes had been refused fuel at airports in Britain, Germany and the United Arab Emirates (UAE) because of US sanctions.
Germany and Britain say they have no such ban, while a source in the UAE says a private company refused to refuel an Iranian plane but there is no government ban.
Last month the UN Security Council voted to impose a fourth round of sanctions on Tehran for failing to halt its nuclear enrichment programme.