Alaska Airlines DEN Terminal +1-888-839-0502 Alaska Airlines DEN Terminal serves from Concourse C at Denver International Airport (DEN), which is accessed through the Jeppesen Terminal. Flyers may check in at the Alaska Airlines ticket counters on Level 6 prior to security screening. Flight check-in, printing boarding passes, and bag drop-off can be done at self-service kiosks or manned counters. Services for baggage entail regular checked bag charges and handling oversized bags. One personal item and one carry-on are permitted per passenger by the airline. Some extra services include changes of flights, same-day standby, and customer service. Within Concourse C, amenities such as dining,......See More