Hartsfield-Jackson Atlanta International Airport (ATL) continues to hold the title of the busiest airport in the United States in 2025. This facility has consistently ranked as a major global hub since the turn of the millennium, providing nonstop services to destinations worldwide. Serving as a critical base for Delta Air Lines (NYSE: DAL), ATL is a cornerstone of the airline’s operations and connectivity, supporting a significant volume of passenger traffic.
The airport, located approximately 10 miles south of downtown Atlanta, is named after former mayors William B. Hartsfield and Maynard Jackson, key figures in the city’s development. Since 1998, ATL has led the world in passenger traffic, except for 2020 when it rebounded to 108.1 million passengers in 2024. The facility is not only the global leader in aircraft movements but also the largest single-airline hub, predominantly serving Delta’s extensive network.
Infrastructure and Connectivity
Spanning over 4,700 acres, ATL features multiple concourses and dozens of gates, enabling efficient connections for travelers. The airport is well integrated with the surrounding metropolitan area through the Metropolitan Atlanta Rapid Transit Authority (MARTA), which provides quick access to downtown Atlanta via its Red and Gold lines.
Airside, ATL boasts five parallel runways with the longest capable of accommodating the Airbus A380. This robust runway system, combined with extensive terminal infrastructure, enhances operational efficiency. The airport’s scheduling system allows Delta and other airlines to maximize flight availability, which is crucial for meeting travel demand.
The history of Hartsfield-Jackson Airport dates back to 1924, when it was established on a former racetrack. With early services provided by Eastern Air Lines and later Delta, the airport evolved significantly over the decades. Following a major terminal expansion in 1961, the facility underwent explosive growth, culminating in the construction of the current complex that opened in 1980.
Delta Air Lines: A Dominant Force
Delta Air Lines’ presence at ATL is unmatched, with the airline accounting for approximately 73.7% of passenger traffic. When factoring in its regional subsidiary, Endeavor Air, this figure rises to 78%. This dominant market share enables Delta to offer over 1,000 daily flights, reinforcing its position as a leader in the aviation industry.
Recent years have seen the emergence of low-cost carriers such as Frontier Airlines and Spirit Airlines, which have expanded their operations at ATL. This influx of budget options has created additional fare choices for travelers, increasing competition in the market. Nevertheless, Delta’s established network and frequent flyer program, SkyMiles, continue to attract a significant number of passengers.
Internationally, carriers like Virgin Atlantic, Turkish Airlines, and Qatar Airways have increased their presence at ATL, expanding the airport’s global reach. This is complemented by the extensive ground transportation options available, including the MARTA system, which facilitates easy transfers for travelers.
In conclusion, Hartsfield-Jackson Atlanta International Airport remains a critical hub not only for Delta Air Lines but for the global aviation landscape. The airport’s historical significance, combined with its strategic importance to Delta’s operations, ensures its status as a linchpin in international air travel. As airlines continue to adapt to changing travel patterns, ATL’s role in the industry is poised to remain influential for years to come.