This paper is a partial account of the results from a 2010 research focusing on the application of the Cala Couta lifecycle model in measuring the satisfaction of the passengers with services provided by Iran Air Services, its influencing factors, and a ranking of the said factors. The statistical population consisted of the passengers using domestic or international flights more than twice in two years. Of these, 385 persons were chosen, and the data were gathered by Cala Couta model survey using field methods based on the Likert range .The results indicate a satisfaction above average in the three stages of customer attraction, promotion, and retention. There was also an account of above-average satisfaction with sales, airport services, and flight services. The factors influencing the passengers’ satisfaction were ranked according to their priority as follows: (1) company’s name and reputation; (2) satisfaction with services offered to the frequent flier passengers; (3) satisfaction with the quality of the services; (4) satisfaction with prices (tickets, accompanied baggage, special services); (5) satisfaction with the services offered after a ticket is sold; (6) satisfaction with the flexibility demonstrated by the company; (7) satisfaction with the safety of flights.