Boston Logan International Airport’s Terminal E is where Allegiant Air BOS Terminal Although it mostly handles foreign flights, Allegiant and other domestic carriers are served via Terminal E. This terminal conveniently houses boarding gates, security checkpoints, and check-in booths for Allegiant passengers. It has a number of facilities, such as shops, restaurants, and seating places to make waiting for flights comfortable. Because terminal assignments might occasionally change, passengers should make sure they check their flight details for any adjustments. Everything required for a convenient and effective travel experience is available at Terminal E.