HMMMmmmmm… Got one of 'em right.
I guessed ORD, LAX and DCA. Now I realize DCA doesn’t have so many operations - it’s just congested with only one runway to handle the big boys.
Where does VNY, MMU, TEB, and other mainly general aviation airports fit in? The BTS is commercially oriented so it will show only airline airports. It wouldn’t surprise me if TEB had more takeoffs and landings than the airports mentioned above.
Here is a link to the FAA Adminstrator’s Fact Book, which give a pile of statistics about Air Traffic Activity for Towers, Centers, etc.
The December book is linked on this page, so it might be a tiny bit out of date, compared the information on traffic numbers that have been in the news lately.