|Held annually during the last week of July at Wittman Regional Airport in Oshkosh, EAA AirVenture Oshkosh is the largest airshow in the world ? attracting hundreds of thousands of aviation enthusiasts from around the world. It spans the entire spectrum of aviation and attracts 10,000 airplanes each year. The more than 500,000 aviation enthusiasts who attend the event. EAA AirVenture has become important and influential but retains its friendly and personal feel ? part of the reason the world comes to Oshkosh every year.