US sanctions on Iran's aviation industry make travel less predictable as countries cancel flights.

For example, Mahan Air has been accused of supporting the Islamic Revolutionary Guard Corps and helping transport personnel and equipment, according to DW. The United States cannot directly order foreign airports to reject Iranian aircraft, according to DW.

Key figures

  • Percentage: 2.7 (according to CNN Brasil)
  • Amount: $165,000,000 (according to Folha de S.Paulo and CNN Brasil)