Phoenix was one of the rare airlines to offer scheduled passenger service to Atlanta'a Dekalb - Peachtree Airport. The airline inaugurated an Atlanta PDK - Savannah - St. Simons Island - Jacksonville route with a de Havilland DH-114 Heron in April 1980 but the service only lasted a few months. By late summer 1980 the airline had ceased operations.
Heron N507FW at South Expressway Airport near ATL in 1980. Photo courtesy of Bob Garrard.
Here's another photo of N507FW at South Expressway Airport taken in October 1980 after the airline had ceased operations.
Phoenix Airlines route map taken from their timetable effective April 8, 1980. The complete timetable can be seen HERE.