The aim of this study is to investigate under the title “Customer Satisfaction about Check-in Online Towards Low-Cost Airline between Nok Air and Air Asia”. This is a partial fulfillment of 054 351 Research Methodology for Tourism conducted by Yuwaree Mekwan, 3rd year Tourism Management student, Khon Kaen University International College. The collected data will be kept secretly and will not be used for commercial profits or against the law. The researcher kindly appreciates and would like to thank you indeed for your kind cooperation.