Abstract: Nowadays, the dem and for low-cost airlines in the Thailand has also needs more and growing fast. So that many airlines have changed marketing strategies and been trying to lower the costs and service to meet consumer’s demands. Based on this reason, the researcher aims to study Thai consumers’ expectations and satisfaction of services obtained from domestic low-cost airlines. Service marketing mix is employed to compare and analyze the effects on the two components. Relationships between personal characteristics and the consumer’s expectations and domestic low-cost airline service satisfaction are analyzed. Employs sampling method on 400 Thai people who live in Bangkok and have used air transportation to travel. A random convenience sampling technique together with surveys is used to collect data. The results found that at 0.05 significance level demographic characteristics such as gender, age, education, income and occupation do not affect Thai consumer’s expectations and satisfaction of services obtained from different low-cost airlines. However, each aspect of the service marketing mix (7P’S) affects the Thai consumer’s expectations and satisfaction of services obtained from different low-cost airlines differently. Major aspects of 7P’S that concern Thai low-cost airline consumer’s expectations and satisfaction include places, people and physical evidence. Examples are online booking services, easy-to-find and convenient ticketing counters, flight attendant’s good language skills which appropriate attire, airline’s clear announcement of flight departure and eye-catching brand logos at check-in counter. However, promotion demonstrates the bottom ranking.