Multiple choice general knowledge science & technology Which is the Biggest Airport in the world Hartsfield-Jackson Atlanta International Airport Georgia, United States London Heathrow Airport Greater London, United Kingdom Beijing Capital International Airport Beijing, China O'Hare International Airport Illinois, United States Reveal answer Fill a bubble to check yourself A Correct answer Explanation Hartsfield-Jackson Atlanta International Airport has been the world's busiest airport by passenger traffic for over two decades, serving over 100 million passengers annually. The question refers to passenger volume, not physical size by area.