Frontier Airlines Boston Terminal is primarily used for international flights, but Frontier handles its domestic routes from this terminal as well. Passengers can enjoy a range of amenities, including dining options, shopping outlets, and free Wi-Fi. Check-in counters are located on the lower level, and security checkpoints are easily accessible. Frontier passengers should allow extra time for check-in and security, especially during peak hours. The terminal provides efficient services for a smooth travel experience with Frontier Airlines.