At Denver International Airport (DEN), Concourse A is the base of operations for Lufthansa Airlines DEN Terminal. Take advantage of quick check-in choices, such as self-service kiosks and online check-in. For a relaxing pre-flight experience, travelers can use the Lufthansa Business Lounge. Economy Class includes one checked bag weighing up to 23 kg. While you wait for your flight, explore a variety of eating and shopping alternatives.