The Upfield line has one of the least-frequent peak-period services in Melbourne's railway network, with trains operating every 18 minutes during the morning peak, and 20 minutes during the remainder of the day on weekdays (including peak periods) and weekends, and every 30 minutes during early morning, Sundays and throughout the later evening through to the last train. Until the late 1990s, when the line was under threat of closure or conversion to light rail, late evening and Sunday services were provided by nearby tram lines and a bus service that connected with the end of the nearby tram line.