Participants of this study included 244 passengers at three major domestic South Korean airports (Kimpo, Kimhae, & Cheju Airport) in the fall of 2008. The survey was distributed to passengers waiting at the boarding gates and departure and arrival lounges in each airport. All participants were passengers having previous experience with LCCs or FSCs whose responses were based on the importance of the defensive effects of the customer. Participation was voluntary and the response rate was 69.3%. The data for this study were collected with the assistance of five trained interviewers. Out of 400 questionnaires distributed, 277 were returned. Due to missing data or incomplete responses, 33 questionnaires were excluded. Consequently, the data from 244 surveys were retained for analysis.