Hello! Concourse A at Denver International Airport is where Sun Country DEN Terminal is based. The terminal provides ample seating areas for a comfortable pre-flight experience in addition to a range of restaurants and shopping opportunities. Make sure to get to the security check early. Have a wonderful journey and enjoy your trip with Sun Country from DEN! Visit Us:- https://www.terminalfind.com/sun-country-airlines/sun-country-den-terminal-denver-international-airport/