Travel plans upended as Spirit Airlines shuts down, leaving passengers scrambling for other options

By Alaa Elassar, Gloria Pazmino, CNN (CNN) — Terminal A at LaGuardia Airport sat unusually quiet Saturday morning — no lines at the counters, no Spirit Airlines staff anywhere, just a sheet of paper taped over a cardboard sign. “We regret to inform you that Spirit Airlines has ceased global operations,” read the sign in