Spirit Airlines serves a significant market with its ultra-low-cost travel options from Newark Liberty International Airport ( EWR) . Located just 15 miles from Manhattan , this busy terminal offers travelers convenient access to one of the busiest urban centers in the United States . Spirit Airlines operates out of Newark ‘s Terminal A and offers a variety of air travel to popular destinations both within and outside the United States . the country to popular destinations . Spirit Airlines is a popular choice for budget- conscious travelers looking to explore the East Coast and beyond , due to its commitment to affordability and efficiency .