What Terminal is Delta Airlines at DEN? Delta Airlines operates from Concourse A at Denver International Airport (DEN). Travelers consistently praise the smooth experience and excellent customer service at Delta's terminal. From the ease of check-in to the attentive staff at the gates, every detail feels designed to make your journey stress-free. The modern facilities and well-organiz... https://airlinesairportsterminals.com/delta-airlines/den-terminal-denver-international-airport/