During the first weekend in May, people from all over the world flock to Louisville for the Kentucky Derby. But Fred Benz and his wife typically leave that weekend to avoid the rush of tourists.

Whenever they do, Benz notices how packed the tarmac at Louisville International Airport becomes, which led him to wonder how many planes fly into the city over the course of Derby weekend.

As part of Curious Derby -- a special series by the producers of Curious Louisville -- WFPL reporter Kyeland Jackson set out to find the answer: