The airport was dedicated on 26 October 1945. Airline flights began in 1954. The terminal building built in 1960 was used until the present terminal was completed in 1987. By 1969, Willard was the second-busiest airport in the state of Illinois. The university continues to operate the airport and provides an annual subsidy of $433,000 for its operations. Traffic at Willard airport declined significantly from 2005 to 2013. According to FAA published data, in CY2013 there were 84,853 passenger enplanements compared to 132,077 in 2005. Overall traffic also declined to 54,653 total Combined TRACON / Tower operations in CY 2013 compared to 123,341 in CY2005. The airport gained some notoriety for a January 21, 1998, incident in which
Air Force One became stuck in mud, requiring a backup aircraft to transport President Bill Clinton from a speaking engagement at the University of Illinois'
Assembly Hall. The pilot opted to enter the main taxiway from the ramp using a feeder taxiway with an unusually large angle. Due to the wide turn, the right main gear left the taxiway and slipped into the soft turf, causing the aircraft to be lodged in the mud. The Air Force dispatched backup aircraft
SAM26000, which first entered service during the
Kennedy Administration and would be retired later in 1998. In January 2023, the airport announced that larger planes will service Dallas–Fort Worth and that expanded service will be offered to Chicago O'Hare. Also, the Institute of Aviation announced an expanded pilot training program. The airport also announced plans to expand the passenger terminal and TSA facilities as well as to upgrade the taxiway design to remain aligned with FAA standards. In addition, plans for new firefighting facilities are in the works, especially featuring the airport's first new fire truck in 19 years. == Facilities and aircraft ==