To add TSA PreCheck to Malaysia Airlines 1-866-564-8331, contact their customer service or update your profile online. Traveling internationally can often feel overwhelming, especially when departing from busy airports in the United States. TSA PreCheck is a program designed to make the security screening process faster and more convenient for eligible travelers. If you are flying with Malaysia Airlines and want to add TSA PreCheck to your booking, the process requires careful attention to detail. This guide provides a comprehensive step by step explanation of how to add TSA PreCheck to your Malaysia Airlines reservation, along with helpful tips to ensure smooth travel.