In February, the American company was granted approval from the US government to explore resuming sales to Iran after US sanctions were partially lifted in January following a deal on Tehran's nuclear programme.
Boeing has requested final authorisation from the US Treasury for the sale of aircraft, Abedzadeh continued.
He said the reported value of $17 billion (15 billion euros) for the contract was not final and that more details will be provided after further negotiations.
Iran in January reached a memorandum of understanding with European aircraft manufacturer Airbus for the purchase of 118 planes.
That agreement is still pending permission from the US Treasury.
Airbus needs the approval of OFAC (the US Office of Foreign Assets Control) because more than 10 percent of Airbus components are of American origin.