In this study, a study on customer satisfaction of passengers low cost airlines a more automatic registration case study in Thailand airline Air Asia, with the objective. 1. to explore the level of passenger satisfaction in the service of automatic registration of more low cost airlines.A case study of airline Air Asia Thailand 2. to study the relationship between demographic characteristics, including gender, age, level of education, professional. And the average income per month with the satisfaction level of the passengers boarding service registration.Low cost airlines case study of airline Air Asia Thailand. 3. to develop guidelines in order to take advantage of a more automatic enrollment, so that passenger satisfaction occurs.