An airport with vacant passenger terminals, which can result from airlines downsizing operations or pulling out of that airport entirely, must creatively market that space to other businesses. Although leasing the unused terminal space to an expanding airline provides an easy solution, an airport's marketing department can also promote the space as an ideal office complex, especially to firms with employees who travel frequently. Leasing space to other businesses catering to air travelers, such as a travel accessories store or chair massage studio, will also provide the airport with commercial rental income