It is advised that travelers arrive at the Delta Airlines EWR Terminal at least two hours prior to domestic flights and three hours prior to international flights for a seamless travel experience. You can check in, go through security, and drop off your bags stress-free with this extra time. Arriving early guarantees you enough time to unwind, check out the facilities, or have a meal before boarding your Delta Airlines flight, as Newark Liberty International Airport can get crowded during peak hours.