Alaska Airlines operates from Terminal B at Boston Logan International Airport (BOS). If you're wondering, what terminal is Alaska Airlines at BOS, it’s Terminal B, where passengers have access to smooth check-in services, efficient security checkpoints, and convenient baggage claim. The terminal offers various dining options, shops, and comfortable seating areas to enhance the travel experience. Alaska Airlines passengers can also enjoy access to premium lounges located within the terminal. Terminal B’s layout ensures easy connections for those with layovers, making it a preferred hub for seamless travel.