King Fahd International Airport in Riyadh, Saudi Arabia
King Fahd International in Saudi Arabia is the world's biggest airport. - Denver International is second.
Dubai airport
The biggest airport structure in the world is the Boeing Assembly plant on the north side of Paine-Snohomish Airport.
The second biggest in passenger traffic is Beijing Capital Airport in China.
O'hare
NO, -Bangkok is not even in the top 20 airports in the world.
Hit route
I would say Denver International Airport in Denver,
Riyadh's "King Khalid International Airport" is the biggest airport having 484 square/miles. Answered by Shuvo Mahmud:
Incheon airport in South Korea looks like a rabbit. It's the biggest rabbit in the world.
The biggest airport in Germany is in Frankfurt.
King Fahd International Airport, Saudi Arabiasecond answer. Considerations such as 'biggest' are liable to confusion. Better alternatives to big are - the largest land area; the most populous, the longest.
King Fahd International Airport in Damman, Saudi Arabia is the largest airport in the world in terms of land area (780 km²).