Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Flint to Wausau as you normally would.
FNT stands for Flint Bishop Airport, while CWA stands for Wausau Central Wisconsin Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.