On July 16, 2020, the airport began a project to replace the aging GA terminal as well as the old airline terminal built in 1958 and 1971 respectively with a new modern GA terminal. The high cost to maintain both facilities, as well as there is no chance that airline service will return to Wittman as Appleton International Airport has expanded to now serve Oshkosh leaving no need for an airline terminal as the primary reasons to replace the terminal. The new terminal is planned to open sometime in early-mid July 2021 in time for AirVenture 2021.