What Terminal is Spirit Airlines at EWR? Spirit Airlines is based at Newark Liberty International Airport (EWR), Terminal A. This terminal has a number of amenities to provide for travelers and is mainly utilized for domestic flights. For a more seamless travel experience, Spirit Airlines customers can locate self-service kiosks, baggage claim facilities, and check-in counters in Terminal A. Travelers can enjoy the convenience of a variety of restaurants and shopping options at the station. AirTrain and shuttle buses provide convenient connectivity between Terminal A and the remainder of the airport.