Some analysts are skeptical that Iran has a large demand for aircraft, and it has enough financing

Aviation giants Airbus and Boeing Co have received permission from the US government to sell aircraft to Iran, part of landmark deals potentially worth some $50 billion in total following last year's nuclear accord.

The announcements on Wednesday came as Iranian and US leaders are in New York for the United Nations General Assembly and show that the outgoing administration of President Barack Obama is honoring the economic terms of the nuclear pact.