Spirit Airlines is expanding its network by adding 40 new routes and two destinations this spring, following a four-month bankruptcy restructuring. Starting June 4, the airline will launch nonstop flights to Chattanooga, Tennessee, and Columbia, South Carolina, with one-way fares beginning at $50. The expansion includes 34 additional routes in May, enhancing connectivity from key airports like Nashville and Baltimore. Despite facing financial challenges, including a $1.2 billion net loss last year and operational difficulties due to engine inspections, Spirit remains focused on providing affordable travel options and recovering its financial stability.