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In 2026, 
Hartsfield-Jackson Atlanta International Airport (ATL) continues to hold the title of North America’s busiest airport by total passengers, processing more than 100 million travelers in 2025 and maintaining a significant lead over other busy airports. Data from aviation analytics firms and the airport show that Hartsfield-Jackson’s dominance is not a temporary title, but the result of advantages in its geography, airline hub concentration, as well as its operational efficiency.
While other airports in the United States, like Chicago O’Hare International Airport (ORD), have competing claims tied to aircraft movements versus total passengers in determining the busiest airport, Atlanta continues to lead by the most widely used metric: total passenger volume. Even as other airports experience significant growth, Atlanta’s dominance remains intact, with daily averages of almost 300,000 passengers moving through the airport each day.
Atlanta Keeps The Crown For Busiest North American Airport
Hartsfield-Jackson Atlanta International Airport (ATL) has long held the title of being the busiest airport in the world by total passenger volume. Annual totals for the airport consistently exceed 100 million passengers, excluding the years between 2020 and 2022 as the airline industry recovered from the COVID-19 pandemic. The astonishing number of passengers that pass through Atlanta each year places ATL ahead of all other US airports and almost always at the top of global rankings. In addition, the gap between Atlanta and its closest competitors is substantial, with a gap of about 11 million passengers between ATL and 
Dubai International Airport (DXB) in the UAE for 2025.
Looking at 2025 statistics more closely, data published by the FAA and the airport itself shows Atlanta handled 106,302,208 passengers, representing an average of about 291,000 passengers every day. However, 2025 passenger volumes at the Atlanta airport did decrease about 1.6 percent from 2024, making it just one of two airports in the top 12 busiest airports to experience a drop in passenger volume year to year. Additionally, while air travel has rebounded significantly since 2020, Atlanta is still operating with about 4 million fewer passengers passing through its airport compared to 2019 when the airport handled 110.53 million travelers.
In 2025, Atlanta also saw a significant focus on domestic operations within the United States. 91.44 million passengers, or 86% of Atlanta’s total passenger volume, were considered domestic travelers, with the other 14.86 million, 14% of total volume, being international passengers. These figures make sense given Atlanta’s main use as a connecting airport rather than an origin or destination airport.
Why Is Atlanta Such A Busy Airport In North America?
Atlanta’s geographic location plays a critical role in maintaining its status as the busiest airport. Positioned in the southwestern United States, Atlanta is within a two-hour flight of 80% of the US population and cities like New York, Dallas, and Chicago. Additionally, it is situated just a short flight away from Mexico, the Caribbean, and Central America. As such, Atlanta is an efficient connecting point for travelers flying across the United States, from the East Coast to the Caribbean or even from Europe to the rest of North America.
The airport’s strong domestic connectivity further boosts passenger numbers. Many passengers traveling through Atlanta are connecting onto other flights, especially given Delta’s global hub at the airport. Flights from all over the country, as well as from international destinations, feed into Atlanta, with passengers then connecting onto smaller flights to cities around the southwestern United States or further. In fact, over 150 total destinations across six continents are served from Hartsfield-Jackson, making the airport a true global hub for connectivity.
Further, ATL has been named the most efficient airport in the world over 19 times by the Air Transport Research Society based out of the University of Maryland. With five parallel runways, seven concourses, and 27 airlines serving the airport, the number of aircraft the airport can handle is truly astonishing. All the 152 domestic gates and 40 international gates are arranged along seven different piers, or islands, connected by a three-mile underground train network that carries more than 200,000 passengers every day. Additionally, the parallel runways allow for simultaneous landings and takeoffs, with the terminal layout also increasing efficiency in terms of pushback and taxi procedures.
Ed Bastian Shoots Down The Idea Of A Second Atlanta Airport
The Delta CEO says that Atlanta needs to continue to invest in an airport asset that is the envy of the world.
Delta’s Gigantic Presence In Atlanta
Delta Air Lines’ dominance in Atlanta is one of the most significant drivers of passenger volume. Atlanta serves as Delta’s largest hub, with thousands of weekly departures connecting passengers across the airline’s global route network. This concentration of flights to and from Atlanta funnels travelers through the airport, boosting total passenger counts.
In 2025, Delta operated a whopping 73.25% of all flights from Atlanta, totaling about 6.4 million passengers over the course of the year. For comparison, the next closest airline to Delta in terms of passengers moved was Southwest Airlines at just 366,000 or 4.23% of all ATL passengers. Delta’s hub strategy, particularly at Atlanta, relies on flights arriving and departing in waves, allowing passengers to connect quickly before departing flights leave shortly after. This structure maximizes efficiency through the carrier’s Atlanta mega-hub and is a key reason why the airline is able to move over 6 million passengers through ATL every year.
The airline’s use of larger aircraft on many routes also contributes to higher passenger totals. More seats per flight mean more travelers are transported without drastically increasing total flight operations. For example, most of Delta’s flights out of Atlanta are operated by either Boeing 737 or Airbus A320 aircraft, with regional flights even utilizing larger aircraft like the Bombardier CRJ-900 or Boeing 717. This contrasts with other major airports that have more total flight operations than Atlanta, like Chicago’s O’Hare International Airport, where a large portion of flights are operated by smaller regional jets.
Chicago O’Hare’s Competing Claim Of North America’s Busiest Airport
While Hartsfield-Jackson is the busiest airport in North America and the world by passenger volume, the debate over which airport is truly the busiest often depends on how “busy” is defined. Describing airports by their total passenger numbers means measuring how many people travel through an airport in a given year. On the other hand, the busiest by aircraft movements counts which airport has the most takeoffs and landings. These two metrics can, and often do, produce different leaders depending on which parameter is used.
O’Hare (ORD) frequently ranks, and leads, the global rankings for busiest airport in this other measurement: aircraft movements. In 2025, ORD handled 857,392 total aircraft operations, accounting for a 10.48% increase year over year. Within this figure, 753,889 flights were domestic operations while 103,503 were international. In terms of passenger volume, the measurement where ATL reigns supreme, Chicago handled 84,851,825 passengers, a significant decrease of over 20,000 travelers compared to Atlanta. In contrast, Atlanta handled just over 800,000 operations. Specifically, the airport recorded 805,268 total operations with 722,938 domestic and 82,330 international ones.
Like Atlanta, Chicago O’Hare’s structure and location plays a huge role in its position as one of the busiest airports in the world, no matter which measurement is used. With its central geographic position in the US, Chicago is also an excellent connecting point for passengers traveling across the country, with flights to hundreds of domestic destinations, both within the Midwest, but also to both coasts. Additionally, Chicago’s status as a hub for both American Airlines and United Airlines, as well as being located in the third-largest city in America, contributes to its high density operations. However, as mentioned before, Delta’s reliance on slightly larger aircraft in Atlanta allows it to handle more total passengers, even with fewer aircraft operations.
The Busiest Airports In The World In 2025
Here are the six busiest airports of the year so far, and a look at how the list has changed from 2024.
What Does The Future Hold For The World’s Busiest Airports?
Looking ahead, both Atlanta and Chicago O’Hare are investing in major infrastructure improvements to boost capacity. Atlanta continues to expand concourse capacity and modernize terminals to improve the passenger experience. These upgrades are designed to accommodate further growth while maintaining the airport’s impressive operational efficiency.
Meanwhile, in the Windy City, O’Hare had already undergone significant redevelopment, with construction for even further expansion already underway. In 2021, the airport completed a 20-year runway improvement project that saw the introduction of six parallel runways and two crosswind runways as opposed to the intersecting mess of runways before. Additionally, an expansion to Terminal 5, the international terminal at O’Hare, was completed in 2023, boosting capacity further. Within the past few years, ORD also broke ground on an $8.5 billion expansion that will see the introduction of two completely new satellite concourses, an expansion to the existing Terminal 1 satellite, as well as a brand-new Terminal 2. These projects will significantly boost capacity at O’Hare and possibly allow the airport to dethrone Atlanta.
Other US airports, including Dallas/Fort Worth International Airport and Denver International Airport, are also experiencing rapid growth. Increased competition among these large hubs could influence rankings in the coming years, but Atlanta’s geographic advantage and hub concentration provide a strong foundation for continued success.
