Newark Liberty International Airport faced another ground stop on Sunday, resulting in cancellations and delays amid ongoing air traffic communication issues and staffing shortages. While waiting areas were less crowded than previous weeks, travelers like Akash Gupta experienced significant delays, prompting advice from experts to seek alternative flights and utilize airline apps for rebooking. Proactive measures are recommended for upcoming flights, including taking advantage of flexible travel policies from airlines and preparing carry-on essentials for potential delays.