The 10 Busiest Airports in the US in 2027

Hartsfield-Jackson Atlanta International Airport boarded 51,459,786 passengers in 2025, the most of any airport in the country. That was down 2.0% from 52,511,402 in 2024, but Atlanta's lead over the rest of the list barely moved. It is Delta's home hub, which is why so many trips across the South and East connect here, and the FAA classes it as a large hub.

Dallas Fort Worth International Airport boarded 41,297,009 passengers in 2025, down 2.5% from 42,351,316. It sits between two big cities and is American Airlines' largest hub, so it carries a huge share of the connections that cross the middle of the country. It is the busiest airport in Texas.

Chicago O'Hare International Airport boarded 40,680,735 passengers in 2025, up 5.5% from 38,575,693. That was the biggest gain among the top three and it pushed O'Hare past Denver. It is a hub for both United and American and the main airport for the Midwest.

Denver International Airport boarded 39,976,695 passengers in 2025, almost exactly level with 40,012,895 in 2024, a change of -0.1%. It is United's and Southwest's big Mountain West base and the main way in to Colorado's ski country.

Los Angeles International Airport boarded 36,497,303 passengers in 2025, down 3.4% from 37,760,834. It is still the busiest airport on the West Coast and the biggest US gateway for flights across the Pacific.

John F. Kennedy International Airport boarded 30,792,806 passengers in 2025, down 2.1% from 31,466,102. It is New York's main international airport and the busiest on the East Coast outside Atlanta.

Orlando International Airport boarded 27,999,709 passengers in 2025, up 0.5% from 27,859,783. It is the busiest airport in Florida, driven by theme park and family vacation travel rather than connections.

Harry Reid International Airport in Las Vegas boarded 26,531,765 passengers in 2025, down 6.1% from 28,244,966, the steepest drop in the top ten. Most of its travelers are visitors heading to the Strip, which is only a short ride away.

Miami International Airport boarded 26,450,972 passengers in 2025, down 0.5% from 26,588,002. It is the main US gateway to Latin America and the Caribbean and a major hub for American Airlines.

San Francisco International Airport boarded 26,251,850 passengers in 2025, up 4.7% from 25,078,968, one of the strongest gains in the top ten. It serves Silicon Valley and is United's main gateway to Asia.