Which Terminal is United at Newark Airport:- United Airlines operates from both Terminal A and Terminal C at Newark Liberty International Airport (EWR). Terminal A is dedicated to domestic flights and is mainly used by United Airlines. It has 29 gates and is connected to the main terminal building by a walkway. Terminal C is used by United Airlines for both domestic and international flights. It has 68 gates and is connected to the main terminal building by an AirTrain. To find out which terminal you should go to for your United Airlines flight, you can check your flight itinerary, contact United Airlines directly, or consult the airport’s website or information desk.