O'Hare International Airport is the nation's busiest

Before you go, we thought you'd like these...
Before you go close icon
Chicago O'Hare Takes Back 'Busiest U.S. Airport' Title

Chicago's O'Hare International Airport is once again the busiest air traffic hub in the U.S., at least by one metric.

"When passenger and cargo traffic are combined, congratulations are in order again for Chicago. O'Hare back on top for the first time in a decade," said NBC's Brian Williams.

The metric that gave O'Hare its crown back was flight operations, which the Federal Aviation Administration defines as either a takeoff or a landing on an airport's runways.

Busiest airport
See Gallery
O'Hare International Airport is the nation's busiest
Passengers take escalator to Terminal 3 at O'Hare International Airport on Friday, Jan. 9, 2015, in Chicago. Two to three inches of snow fell across the Chicago metro area Thursday night. (AP Photo/Nam Y. Huh)
O'hare terminal concourse C at Chicago.
United Terminal Pedestrian tunnel at Chicago O'Hare International Airport. People wheelchair disabled cabin flight crew walking
A commercial jet is headed for a landing at O'Hare International Airport in Chicago, IL as storm clouds build.
The new O'Hare international airport Chicago, Illinois, Usa
Pedestrian tunnel between Concourses B and C of United Terminal at Chicago O'Hare International Airport with moving neon lights.
2007 O Hare International airport Chicago Illinois American Airlines Terminal

O'Hare saw more than 880,000 (881,933) flight operations in 2014, edging out Atlanta's Hartsfield-Jackson International Airport, which took the top spot in 2005.

In third comes Dallas/Ft. Worth, then Los Angeles International and Denver International.

But planes aren't the only thing moving through airports. If you look at the numbers of people traveling, Atlanta is still top dog. (Video via WLS-TV)

Numbers from the Airports Council International show Hartsfield-Jackson drew 72,199,400 passengers in 2014. That's almost 20 million more travelers than at O'Hare, with 52,434,527.

More on AOL.com
Disney parks-linked measles outbreak grows to 70 cases
Newtown votes to raze home of gunman in school massacre
Over 100 birds found dead in California covered in mysterious goo
Read Full Story

People are Reading