Purpose - The purpose of this study is to understand the structural relationship of cabin crew''s Job Insecurity, organizational commitment, turnover intention due to changes in the Airline’s External Environment. Design, data, and methodology -This study was conducted on airline cabin crew working for domestic FSC(Full Service Carrier) airlines. And a total of 300 respondents were used for the final analysis. The data from the survey were analyses using SPSS 20.0 and AMOS 22.0 statistics package. Frequency analysis was performed to examine the general characteristics of sample, Structural equation model was implemented for confirmatory factor analysis, Cronbach''s alpha calculation, correlation analysis, and mediating effect test. Result - As a result of study first, Hypothesis 1 of “the job insecurity according to the airline''s environment will have a significant effect on organization commitment” was adopted. second. Hypothesis 2 for “cabin crew''s organization commitment will have a significant effect on turnover intention” was adopted. As a result of study third, Hypothesis 3 of “the job insecurity according to the airline''s environment will have a significant effect on turnover intention” was adopted. Conclusions - The implication of this study is to derive the roles and tasks of airlines that can minimize the employment instability of airline cabin crew.