Fairfield Avenue is a stop along SEPTA's Media-Sharon Hill Trolley Lines in Upper Darby, Pennsylvania. It is officially located at Fairfield Avenue & Terminal Square, but the intersection also includes Bywood Avenue, which is a one-way street running west along the lines until the Beverly Boulevard stop. The stop serves both Routes 101 and 102. Only local service is provided on both lines. This station is the penultimate stop on the Media-Sharon Hill Trolleys before reaching the 69th Street Terminal.