The EAA estimated the attendance in 2018 at over 600,000, with 2,714 visitors registered from 87 nations. There were approximately 10,000 aircraft, 2,979 show planes, and 976 media representatives on-site from Six continents, along with 867 commercial exhibitors.

The large number of aircraft arrivals and departures during the fly-in week makes the Wittman Field FAA control tower the busiest in the world for that week in number of movements.  To accommodate the huge flow of aircraft around the airport and the nearby airspace, a special NOTAM is published each year, choreographing the normal and emergency procedures to follow. More than 4,000 volunteers contribute approximately 250,000 hours before, during and after the event.