Wondering what terminal is Alaska at DIA? Alaska Airlines operates from Concourse C at Denver International Airport (DIA). The terminal offers streamlined check-in, efficient security, and great amenities. If you're flying with Alaska Airlines, head to Concourse C for departures and arrivals. Know exactly what terminal is Alaska at DIA to travel stress-free. https://airlinesterminaloffice.com/alaska-airlines/alaska-airlines-den-terminal-denver-airport/