It’s important to clear that the United States aviation industry is huge, valued at $1.54 trillion, contributing 5% to the country’s GDP. It’s categorized into three parts: Commercial Service, Public-Use, and the “Core 30 airports”. While the public airports operated around 5000 facilities, all open for public use, the Commercial Service airports have slightly over 500 facilities specially meant for scheduled commercial flights.
The Core 30 airports have 30 major hubs in selected parts of the country, namely: Atlanta, Los Angeles, and Chicago. All these airports handle a significant number of passengers annually. According to data from TSA checkpoints, the United States airports receive over 906 million visitors annually. In this piece, we will be pointing out the biggest airports in the United States, their size, features, and other details that made them unique.
Measuring 135.69 square kilometers and spanning 33,500 acres, this massive airport is located in Colorado and ranks among the biggest airports in US by area. Receiving an average of 1900 flights daily, it’s also the second-biggest airport in the world, and the biggest in North America. Denver Airport. The major terminal, Jeppesen Terminal, covers 2.6 million square feet of land, while the fiberglass roof is large enough to fit four football fields.
The Denver International Airport also had the longest commercial runway in North America. It operates six runways, but one stood out: the 16R/34L runway, specially designed for heavy-duty aircraft, measures 4.88 kilometers (approximately 16,000 feet) long. Lastly, it operates an underground train facility designed to connect people to the main Jeppesen Terminal using 300 miles of roads that have served 77.8 million passengers passing through 172 gates.
Also listed among the biggest airports in US by traffic and size, this facility sits on 17,183 acres of land and receives 85.7 million passengers annually, with a daily average of 1,900 to 2,000 flights. Aside from having a free shuttle bus service, there’s Terminal D: a flagship terminal with a massively equipped modern shopping mall, and a public art program worth millions of dollars. Measuring 2 million square feet, Terminal D has an exquisite selection of food, including Banh Shop. Dallas/Fort Worth International Airport houses Airline Hub Lounges, which have served as a major mega-hub for American Airlines.
There are also Terminals A and D, as well as a private nap suite that passengers can rent for a quick nap while at the airport. It contains hot showers for passengers who wish to extend their stay, daybeds, and a workstation. The airport also has Premium Club lounges in Terminal D, a luxury option for most passengers. Among them are the American Express Centurion Lounge and the Capital One Lounge.
Sited 10 miles southeast of Fort Myers, the Southwest Florida International Airport operates on 13,568 acres of land with an annual passenger count of over 10 million. The daily flight schedule ranges from 200 to 250 flights and serves as a commercial gateway to the Gulf Coast, Sanibel Island, and Naples. It has a 27-gate single-terminal complex spread across three concourses.
The airport is currently undergoing a $1.1 billion expansion project, including the construction of Concourse E. When completed, this new facility will house 14 gates and will double the already existing space in the old concourses. The Concourse E project will also complement the concourse security lines to improve the flow of passenger traffic.
Measuring 20.7 square miles on 12,264 acres, the Orlando International Airport serves 57.7 million passengers annually, with 1,000-1,100 flights daily. With an annual passenger traffic of 58 million, this classic orb-looking airport, like its counterparts, has a few interesting facilities that make it worth using. Among them is the multimodal transport hub, which made movement in the airport much easier, e.g., the 80,000-square-foot Brightline High-Speed Rail terminal, which can travel from the airport to West Palm Beach in 2 hours.
Orlando International Airport, like Southwest Florida International Airport, is also undergoing an expansion to add four modern Multiple Aircraft Ramp System (MARS) gates to its operations. This will serve wide-body aircraft or comfortably fit two moderate-sized domestic aircraft. The airport also features a 450-foot enclosed pedestrian canopy bridge that directs pedestrian traffic to Terminal C, leading directly to mass transit and parking without having to step outside.
Washington Dulles is Washington DC’s major gateway to the international community and ranks as the 5th-largest airport in the United States. This airport sits on 13,000 acres of land, measuring 18.7 square miles, with annual visitors of 25-29 million. It has daily flight traffic of 750-800 and is also one of the oldest airports, having been operational since 1958.
To ease the growing traffic congestion, the airport is currently undergoing modernization and aims to extend its terminal by 300 feet on the West and east sides while maintaining the original design. The Tier-2 Concourse is also under construction and is meant to replace the already-demolished Concourse C/D facilities, which are pre-1980 infrastructure.
Also, as part of the major expansion of the airport, there’s an ongoing construction of Concourse E, scheduled to finish up later in 2026. When completed, it will be a $500 million facility that connects the AeroTrain station and eases the growing number of domestic and regional aircraft arriving at the airport.
Opened for operations in 1969 in Houston, Texas, George Bush Intercontinental Airport is not only one of the U.S.'s biggest airports but also one of the oldest. Measuring 17.1 square miles across 10,000 acres, this airport has one of the largest airline terminals, linked to underground rail and an above-ground automated walkway system, serving as a major international gateway to Latin American countries such as Central America, Mexico, and South America.
It was formerly called Houston Intercontinental Airport before being renamed after former President George. H. W. Bush in 1997. It has an underground subway system, all connected to its five terminals, including the airport hotel. It also has a well-equipped, dedicated yoga studio at Gate A3: the Terminal A Yoga Studio. It has a mat and yoga-inspired serenity for passengers who wish to have a moment of peace.
The Salt Lake City International Airport spans 7,700 acres and covers 12.0 square miles. It receives approximately 27 million passengers annually, with a daily flight count of 900-950. The airport has grown even larger after a massive $5.1 billion upgrade. The airport replaced its old terminals, which have been in use since the 1960s. Also replaced were the linear concourses: Concourse A and B.
Located at Corsair Way in Salt Lake City, Utah, the airport has a massive smart parking lot with camera-based sensor systems that measure 1.3 million square feet and can accommodate 3,600 cars. The airport’s massive, automated baggage handling infrastructure features the latest technology, including a conveyor belt measuring 7-9 miles.
The airport’s expansion project includes multiple structures, including a 4- to 5-story building that spans 250,000 to 300,000 square feet, equivalent to 5 professional football fields. And as part of the upgrading program, the airport is transitioning to eco-friendly power sources. The airport is having an overhaul of its electric equipment. They’re replacing their pushback tractors, baggage tugs, and other ground service equipment with electric, with the intention of eliminating fossil fuels from their ground handling services.
The Chicago O’Hare International Airport is built on 7,627 acres, measuring 11.9 square miles. It records annual visitor traffic of 74 million, with daily flights between 2,300 and 2,400. This airport ranks #1 in total flight operations in the United States. The airport has eight operational runways, more than any civilian international airport in the United States. O’Hare Airport is one of the very few airports in the country that serves as a major hub for two major US airlines: American Airlines and United Airlines.
The interior space at the O'Hare terminal building measures 5.5 million square feet, carefully distributed across 193 operational passenger gates. The international terminal (Terminal 5), a 1.3 million-square-foot facility, was recently expanded by 350,000 square feet, adding 10 new general baggage systems and large-body gates to accommodate increased overall operations.
Most airports in the United States are old and very much operational, despite being the country's largest operational aviation facilities. The idea of expansion is to give it more space to accommodate more people and upgrade the already existing equipment to meet modern trends thereby improving its operations.
Aside from internal factors driving these expansions, the ever-changing economic environment in the United States, on a global scale and driven by intense competition from China, is the main driver, which is why these massive airport projects and expansions keep happening almost every half-decade. Finally, it can only get bigger and busier with every US airport as the factors propelling these activities keep growing stronger as day go by.