Purdue University Airport (IATA: LAF, ICAO: KLAF, FAA LID: LAF) is a public-use airport in Tippecanoe County, Indiana, United States. It is owned by Purdue University, and is 2 nautical miles (3.7 km; 2.3 mi) southwest of the central business district of Lafayette, Indiana, in West Lafayette.

Because of the heavy traffic generated by Purdue University and its flight programs, Purdue University Airport is one of the busiest airports in Indiana, second only to the Indianapolis International Airport. According to Federal Aviation Administration (FAA) records, the airport had 3,161 passenger boardings in calendar year 2022.

The airport is served by Southern Airways Express, with daily passenger flights to O'Hare International Airport in Chicago.

It is included in the FAA National Plan of Integrated Airport Systems for 2021–25, in which its FAA airport category is a regional general aviation facility.