Terminal C at Boston Logan International Airport (BOS) is where Spirit Airlines is based. The Spirit Airlines BOS Terminal is a large, contemporary facility that provides a number of services for passengers. Spirit Airlines passengers have convenient access to boarding gates, security checkpoints, and check-in counters. Additionally, Terminal C has clean restrooms, seating areas, and quick meal options to provide a comfortable pre-flight experience. The terminal has everything you need for a seamless Spirit Airlines flight, whether you're arriving or leaving.