Denver International Airport (DEN) is one of the busiest in the United States, serving as an essential hub for United and Frontier Airlines. It handles approximately 1,700 flights per day and has direct connections to over 200 destinations, 180 of which are within the country, making DEN one of the nation’s most important domestic airline connection hubs. The following guide provides a detailed overview of the Denver Airport terminals and airlines.
List of Airlines Operating at Denver International Airport (DEN)
Denver International Airport (DEN) is divided into three primary concourses: A, B, and C, each serving a particular airline and aircraft operation. Concourse A is the largest and serves both domestic and foreign airlines, making it a hub for Delta Airlines, Frontier Airlines, and JetBlue. Concourse B is dedicated to United Airlines and serves as one of its key operational bases. Meanwhile, Concourse C serves Southwest Airlines and several regional carriers.
Concourse A
Concourse A at Denver International Airport (DEN) is the airport’s largest terminal, serving as a central hub for both domestic and international flights. Major U.S. carriers operating from this concourse include Delta Airlines, Frontier Airlines, JetBlue, and United Airlines, making it one of the busiest areas of the airport. In addition to domestic services, Concourse A handles all international arrivals and departures, providing dedicated customs and immigration facilities to ensure smooth processing for travelers.
Here is the list of all domestic and international airlines at Denver Airport (Concourse A)
| Airline | Ticket Counter | Baggage Claim | Contact |
| Aer Lingus (EI) | East | East | 1 800 474 7424 |
| British Airways (BA) | East | North, International Arrivals | 1 800 247 9297 |
| Air France (AF) | East | North, International Arrivals | 1 800 237 2747 |
| Frontier Airlines (F9) | East | East | 1 801 401 9000 |
| JetBlue (B6) | East | East | 1 800 538 2583 |
| VivaAerobús (VB) | East | North, International Arrivals | 1 866 359 8482 |
| Volaris (Y4) | East | North, International Arrivals | 1 855 865 2747 |
| Aeroméxico (AM) | West | North, International Arrivals | 1 800 237 6639 |
| Air Canada (AC) | West | West | 1 800 247 2262 |
| Breeze Airways (MX) | West | West | 1 501 273 3931 |
| Cayman Airways (KX) | West | North, International Arrivals | 1 800 422 9626 |
| Delta Air Lines (DL) | West | West | 1 800 221 1212 |
| Edelweiss Air (WK) | West | North, International Arrivals | 1 669 272 1225 |
| Icelandair (FI) | West | North, International Arrivals | 1 800 223 5500 |
| Lufthansa (LH) | West | North, International Arrivals | 1 800 645 3880 |
| Sun Country Airlines (SY) | West | West | 1 651 905 2737 |
| Turkish Airlines (TK) | West | North, International Arrivals | 1 800 874 8875 |
| United Airlines (UA) | West | West | 1 800 864 8331 |
| WestJet (WS) | West | West | 1 888 937 8538 |
Concourse B
Concourse B is primarily operated by United Airlines. The airline serves locations around the United States, Canada, and Europe from this concourse.
| Airline | Code | Ticket Counter | Baggage Claim | Contact |
| United Airlines | UA | West | West | 1 800 864 8331 |
Concourse C
Southwest carriers, Alaska Airlines, and other regional carriers operate out of DEN Concourse C. It is also used by Spirit Airlines at gates C48 and C50.
| Airline | Ticket Counter | Baggage Claim | Contact |
| Alaska Airlines (AS) | East | East | 1 800 252 7522 |
| Denver Air Connection (KG) | East | East | 1 855 235 9322 |
| Southern Airways Express (9X) | East | East | 1 800 329 0485 |
| Southwest Airlines (WN) | East | East | 1 800 435 9792 |
Conclusion
Denver International Airport (DEN) is a significant hub for domestic and international travel, offering a wide range of airlines across its three concourses—A, B, and C. Whether you are flying with a major U.S. carrier, an international airline, or a regional operator, understanding the layout of the terminals, ticket counters, and baggage claim areas provided in this helpful guidebook can make your airport experience smoother and more efficient.
Frequently Asked Questions
Frontier Airlines operates primarily from Concourse A at Denver International Airport (DEN), making it one of the key carriers in this terminal.
No, Concourse B at Denver International Airport (DEN) is not primarily used for international flights. It is operated mainly by United Airlines and focuses on domestic flights, with some international routes.
Several international airlines operate at DEN. It includes British Airways, Lufthansa, Air France, Icelandair, Aeroméxico, Copa Airlines, and Volaris, among others.
Denver International Airport (DEN) is the largest airport in the United States by area, covering more than 137 square kilometers.
Denver International Airport has United Airlines and Frontier Airlines as its primary airlines. Frontier Airlines operates mainly from Concourse A, while United Airlines operates from Concourse B.
