“…First of all, variables related to airlines such as flight frequency, frequent flyer program, aircraft type, punctuality, check-in service, ground service, airline brand, fairness, access time, online reviews, baggage fees, and safety information are commonly regarded as important variables (Garrow et al, 2007;Hess et al, 2007;Teichert et al, 2008;Wen et al, 2009;Wen and Lai, 2010;Mathies et al, 2013;Gao and Koo, 2014;Yang et al, 2014;Jung and Yoo, 2014;Koo et al, 2015;Scotti and Dresner, 2015). Other works focus on the features of flights themselves when passengers face several choice alternatives such as schedule time, the number of stopovers, seat comfort, in-flight service, and in-flight travel time (Ortúzar and Simonetti, 2008;Balcombe et al, 2009;Wen et al, 2009;Wen and Lai, 2010;Mathies et al, 2013;Gao and Koo, 2014;Koo et al, 2015).…”