Iran is a big country with so many touristic places. Air travel can help tourists save time and money because flying in Iran is pretty inexpensive and efficient.
All of Iran’s provinces have atleast one airport. You can hop around the country pretty quickly to save on road travel time (and avoid the danger presented by the poor driving habits here). Remember, the country is huge, about 2.5 times the size of Texas or about one-sixth of Europe.
One more thing: Iranian airlines feed you well at no charge!
Some of the best known Iranian airlines are Iran Air, Mahan Air and Iran Aseman Airlines.