Top 10 Busiest US Airports in 2025, No.3 Will Surprise You!!!

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ATLANTA- With 655 airports offering scheduled services in March 2025, air travel in the United States (US) continues to thrive.

The top 10 busiest airports remain unchanged from the previous month, and they account for 35% of the nation’s total capacity.

Busiest US Airports

Notably, Orlando and Phoenix have seen a 7% year-over-year increase, highlighting strong demand in these regions. Let’s take a closer look at the busiest US airports this month.

1. Atlanta Hartsfield-Jackson International Airport (ATL)

Unsurprisingly, Atlanta Hartsfield-Jackson International Airport remains the busiest airport in the United States, with a staggering 5,369,683 scheduled seats this month.

Besides serving as a major hub for Delta Air Lines (DL), its strategic location as a gateway to domestic and international destinations solidify its dominance.

The airport benefits from its extensive connectivity, with over 1,000 daily flights and a strong presence in both domestic and transatlantic markets. Additionally, ATL serves as a key stopover for flights between the East Coast, Midwest, and the southern US.

Despite global challenges, ATL continues to expand, with investments in infrastructure and terminal enhancements aimed at improving passenger experience and handling future growth.

2. Dallas/Fort Worth International Airport (DFW)

Dallas/Fort Worth International Airport follows closely behind with 4,418,156 seats in March 2025. As the largest hub for American Airlines (AA), DFW plays a crucial role in connecting passengers across the country and beyond.

The airport’s central location makes it a vital transfer hub, particularly for domestic travel. Additionally, DFW continues to experience strong international growth, with expanding routes to Europe, Asia, and Latin America.

Infrastructure developments, including terminal renovations and increased gate capacity, have allowed the airport to accommodate rising passenger numbers efficiently.

3. Denver International Airport (DEN)

Denver International Airport ranks third, boasting 4,120,146 seats this month. As a major hub for United Airlines (UA) and Southwest Airlines, DEN continues to see strong demand for both domestic and international travel.

One of the key factors contributing to Denver’s success is its strategic location, serving as a crucial connecting point for flights between the East and West coasts. Additionally, its high-altitude setting allows for efficient long-haul operations.

With increasing demand for leisure and business travel, DEN remains a critical hub in the US aviation network.

4. Chicago O’Hare International Airport (ORD)

Chicago O’Hare International Airport remains one of the busiest airports in the country, with 3,991,850 seats this month. Serving as a key hub for United Airlines and American Airlines, ORD is essential for both domestic and international travel.

O’Hare’s extensive network of flights connects passengers to nearly every corner of the globe, making it a vital gateway for transatlantic and transpacific routes.

Despite occasional weather-related disruptions, the airport’s efficiency and strategic importance keep it at the top.

5. Los Angeles International Airport (LAX)

With 3,754,459 seats in March 2025, Los Angeles International Airport is the busiest airport on the US West Coast. As a hub for American Airlines, Delta Air Lines, and United Airlines, LAX serves as a crucial gateway for transpacific travel.

The airport’s role as a hub for several transpacific flights further strengthens its position. With nonstop services to Asia, Europe, and Latin America, LAX remains a preferred choice for global travelers.

Ongoing modernization efforts, including the upcoming automated people mover system, are expected to further ease congestion.

6. Orlando International Airport (MCO)

Orlando International Airport has experienced a 7% year-over-year increase, reaching 3,261,996 seats. As a key leisure destination, MCO benefits from strong domestic demand, particularly from families traveling to Disney World and Universal Studios.

The airport’s importance is further enhanced by its growing international connections, particularly to Latin America and Europe.

7. Miami International Airport (MIA)

Miami International Airport ranks seventh, with 3,094,535 seats this month. As the primary gateway between the US and Latin America, MIA benefits from strong demand for international travel.

Multiple airlines including American Airlines and LATAM continue to expand their Miami networks, increasing Miami’s importance as a key global hub. The airport’s strong cargo operations also contribute to its overall significance.

8. Phoenix Sky Harbor International Airport (PHX)

Phoenix Sky Harbor International Airport has also seen a 7% increase in capacity, with 3,112,982 seats this month. As a hub for American Airlines and Southwest Airlines, PHX handles significant domestic traffic.

Its role as a major airport in the Southwest US makes it essential for connections to the West Coast and beyond. The airport’s recent expansions have contributed to its continued growth.

9. Las Vegas Harry Reid International Airport (LAS)

Las Vegas’ Harry Reid International Airport plans to handle 3,058,792 passengers this month, driven by strong demand from both tourists and business travelers attending conventions.

As a key hub for leisure travel, LAS benefits from a diverse range of airlines offering services across the US and beyond. LAS has recently seen increasing international connectivity, particularly to Mexico and Canada.

10. John F. Kennedy International Airport (JFK)

Rounding out the list, New York’s John F. Kennedy International Airport offers 3,080,095 seats. As a major hub for transcontinental flights, JFK serves as a critical gateway to Europe, Asia, and beyond.

With multiple major airlines, including Delta, American, and JetBlue, operating extensive networks, JFK remains one of the most important global airports.

Conclusion

The Top 10 busiest US airports continue to play a crucial role in the nation’s air travel landscape, collectively handling 35% of total scheduled capacity. Atlanta Hartsfield-Jackson remains the largest airport by seat count, reaffirming its dominance in domestic and international connectivity.

Moreover, future shifts in demand and airline strategies will determine how these rankings evolve in the coming months.

Featured Image By Clément Alloing | Flickr

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