The purposes of this research are to analyze factors influencing the service quality of Thai Airways International Flights, to identify key problems related with service quality, and to suggest measures for improving the service quality of Thai Airways International Flights. Based on mixed-method approach, a questionnaire survey of 400 examples from Thai and foreign passengers who had experienced in flying with Thai Airways International Flights (TG) at Suvarnabhumi Airport was conducted during the period of June-July, 2020. Qualitative research ...