A Delta jet departs Atlanta's Hartsfield-Jackson International Airport April 14, 2008. Hartsfield held its ranking as the world's busiest passenger airport in 2007, with 89.4 million passenger arrivals and departures, according to the Geneva-based Airports Council International. That's a 5.3 percent increase over 2006. It also led with the most flights, handling 994,346 in 2007.
Credit: AP Photo/John Bazemore
2. O'Hare International
Passengers walk the flag-lined concourse of the main terminal for American Airlines at O'Hare International Airport. Located 20 miles northwest of downtown Chicago, O'Hare was the world's second-busiest passenger airport in 2007, with 76 million people coming through.
Credit: JEFF HAYNES/AFP/Getty Images
3. London Heathrow
Passengers await their flights inside British Airways Terminal 4 at Heathrow Airport, west of London, on Jan. 29, 2007. Heathrow ranks as the world's third-busiest passenger airport with 68 million people. Total worldwide passenger traffic reached an all time high in 2007, increasing by 6.8 percent over 2006.
Credit: ADRIAN DENNIS/AFP/Getty Images
4. Tokyo Haneda
Ground staff with Japan Airlines, Asia's largest air carrier, advise a passenger how to use automatic ticketing machines at Tokyo's Haneda Airport on Feb. 6, 2007. Haneda was the world's fourth-busiest airport in 2007 with 67 million passengers passing through its terminals.
Credit: YOSHIKAZU TSUNO/AFP/Getty Images
A jet lands at Los Angeles International Airport on Thanksgiving Eve, traditionally the busiest travel day of the year, Nov. 22, 2006. Findings released on July 29, 2008, ranks the airport as the world's fifth-busiest last year, with 62 million people traveling through. That's a million more than in 2006.
Credit: GETTY IMAGES/David McNew
6. Charles de Gaulle
Passengers wait in line to check in at the Charles de Gaulle Airport in Paris, Nov. 4, 2006. That was days before new security rules concerning air passenger rules went into effect across the European Union. In 2007, 59.9 million people traveled through the airport, according to figures by Airports Council International released on July 29, 2008.
Credit: PIERRE VERDY/AFP/Getty Images
7. Dallas-Fort Worth International
NHL Eastern Conference All-Stars Brian Rafalski, left, of the New Jersey Devils and Ryan Miller, center, of the Buffalo Sabres welcome home U.S. soldiers returning from a tour of duty in Iraq and Afghanistan at the Dallas-Fort Worth International Airport on Jan. 23, 2007. In 2007, the world's seventh-busiest airport welcomed 59.7 million people through its doors -- a .07 percent drop from the previous year.
Credit: GETTY IMAGES/Bruce Bennett
8. Frankfurt Airport
54.2 million traveled through Germany's Frankfurt Airport in 2007.
Credit: AP Photo
9. Beijing Capital International
Passengers walk through Beijing Capital International Airport on Feb 22, 2007. Chunyun, or the Spring Festival travel season, is a period of extremely high traffic load for China's transportation system. Last year, 53.5 million passengers passed through the airport -- an 10 percent increase over the year before.
Credit: GETTY IMAGES/China Photos
10: Madrid Barajas International
Iberia airlines jets at are shown at Madrid's Barajas International Airport. Barajas broke into the top 10 busiest airports in 2007 with 52 million passenger arrivals and departures -- a 13.9 increase over 2006. U.S. airports in the second 10 include Denver (11); New York's JFK (13); Las Vegas (15); Houston (16); Phoenix (17) and Orlando (20).