Question: I was hoping to make use of one of the direct flight from either Tehran or Tabriz to Yerevan. Do you have any info on where I can buy the tickets? What time do they depart?
Answer: Mahan air and Iran air have direct flights from tehran to Yeravan.
Check this page for flight: http://www.uppersia.com/Iran-transport-services/iran-flight-ticket-booking-service.html
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