Port of Whitman Business Air Center, (FAA LID: S94) is a public use airport located 3 miles (5 km) southwest of the central business district of Colfax, a city in Whitman County, Washington, United States.

[1] It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2017–2021, in which it is categorized as a basic general aviation facility.

Port of Whitman Business Air Center covers an area of 64 acres (26 ha) at an elevation of 2,181 feet (665 m) above mean sea level.

[1] In 2016, the airport had 15,000 aircraft operations, an average of 41 per day: all general aviation.

In January 2018, there were 15 aircraft based at this airport: 13 single-engine, 1 multi-engine, and 1 ultra-light.