As Thai Airways International Public Company Limited, it is necessary to their employees to well known in English language ability. If some do not good at in the field of English language, it will exactly affect the bad image to the company. From the name of the company, that they put the word ‘International Company’, the researcher also points out that it is a very important part of the airline industry. Thus, the main point the researcher will focus on this study is Thai Airways International Public Company Limited English language expectations of employees in terms of communication challenges.