Denver International Airport
Rank City Passengers Carriers
1 Los Angeles , California 1,120,000 American , Delta , Frontier , Southwest , Spirit , United
2 Phoenix-Sky Harbor , Arizona 1,022,000 American , Frontier , Southwest , United
3 Chicago-O'Hare , Illinois 988,000 American , Frontier , Spirit , United
4 Las Vegas , Nevada 938,000 Frontier , Southwest , Spirit , United
5 San Francisco , California 904,000 Frontier , Southwest , United
6 Seattle/Tacoma , Washington 901,000 Alaska , Delta , Frontier , Southwest , United
7 Atlanta , Georgia 835,000 Delta , Frontier , Southwest , Spirit , United
8 Minneapolis/St . Paul , Minnesota 830,000 Delta , Frontier , Southwest , Spirit , Sun Country , United
9 Dallas/Fort Worth , Texas 812,000 American , Frontier , Spirit , United
10 Houston-Intercontinental , Texas 744,000 Frontier , Spirit , United
Statistics -- Top destinations
Denver International Airport (IATA: DEN, ICAO: KDEN, FAA LID: DEN), locally known as DIA is an international airport in the western United States, primarily serving metropolitan Denver, Colorado, as well as the greater Front Range Urban Corridor. At 33,531 acres (52.4 sq mi; 135.7 km2), it is the largest airport in North America by total land area and the second largest in the world, behind King Fahd International Airport. Runway 16R/34L, with a length of 16,000 feet (3.03 mi; 4.88 km), is the longest public use runway in North America and the seventh longest in the world. With over 35,000 employees, the airport is the largest employer in Colorado. The airport is located on the western edge of the Great Plains and within sight of the Front Range of the Rocky Mountains. Opened in 1995, DEN currently has non-stop service to 215 destinations amongst 23 different airlines throughout North America, Latin America, Europe, and Asia; it is the fourth airport in the U.S. to exceed 200 destinations. It has the second-largest domestic network, with 189 U.S. destinations. As of 2018[update], DEN is the 20th busiest airport in the world - the fifth busiest in the U.S. In 2019, DEN served 69,015,703 passengers, the most in the airport's history. It is also the busiest airport in the Interior-West United States. The airport is a hub for both United Airlines and Frontier Airlines and is also a main operating base for Southwest Airlines. These three airlines' combined operations made up about 85% of the total passenger traffic at DIA as of December 2018.