The title of "worst hub for handling luggage" went to Miami International Airport

about 1,000 flights travel through Miami International airport a day.

And about 52 million passengers go through the airport each year and it loses roughly 306 bags for every million flights and 5.5 bags per 1,000 passengers. 

No. 2 is Chicago O'Hare International Airport

Denver International Airport is No. 4

Dallas/Fort Worth International Airport at No. 9

https://www.travelandleisure.com/usa-airport-named-worst-in-world-for-lost-luggage-11785691