Generally, there are three ticket classes for Iran domestic flights: economy, first-class, and business class. There is also another class, called ‘price class’ which is written with English letters. Knowing what these letters mean is not important unless you need a refund. These letters will be assigned to each ticket based on the time of booking, type of cabin, etc. Check out the class section in your ticket to learn more about the regulations related to cancelation and refund.