What Terminal is United Airlines at BOS? United Airlines operates out of Terminal B at Boston Logan International Airport (BOS). This terminal is designed to provide passengers with a smooth travel experience, offering services such as self-check-in kiosks, comfortable seating areas, and access to the United Club lounge for eligible travelers. Terminal B is well-connected to other airport facilities, ensuring convenient navigation. United Airlines serves both domestic and international routes from this terminal, making it a hub for efficient travel. Passengers are advised to arrive at least two hours before departure for seamless check-in and security screening.