Terminal B is the convenient starting point for Spirit Airlines BOS Terminal flights from Boston Logan Airport. Getting ready to fly is quick and easy with rapid check-in alternatives like online check-in and self-service kiosks. Following security, a wide range of dining and shopping options are available. The welcoming employees of Spirit Airlines are always there to help and provide a hassle-free and pleasurable journey. At BOS, Spirit Airlines offers a quick and reasonably priced method to start your trip, whether you're traveling for business or pleasure.