Which airport or airlines is the biggest in the world?

Which airport or airlines is the biggest around the world.Tell me the website all soi?

As far as the biggest airport... it depends what you are measuring it by. For example; number of passengers held, number of square feet, etc.

I did some searching about the biggest airlines around the world and heres what I got:
* 1-American Airlines
* 2-Delta Airlines
* 3-Southwest Airlines
* 4-United Airlines
* 5-Air France
* 6-Japan Airlines
* 7-Northwest Airlines
* 8-Lufthansa
* 9-All Nippon Airways
* 10-US Airways
* 11-Continental Airlines
* 12-British Airways
* 13-Qantas
* 14-Iberia
* 15-easyjet
* 16-Korean Air
* 17-Ryanair
* 18-America West Airlines
* 19-Air Canada
* 20-Scandinavian Airlines