"Sylvania" started on her maiden voyage from Greenock to Montreal on 5 June 1957. On 26 June 1957 she joined her sisters on their northern hemisphere summer service from Liverpool to Montreal via Greenock and Québec. By the time she entered service the growth of passenger numbers in transatlantic liner service had ceased, while the number of passengers transported by the jet airplane was growing. In 1958 the "Saxonia" made one crossing from Liverpool to New York via Cobh and Halifax. In April 1961 she was moved permanently to the Liverpool—New York service, replacing . At some point during her career with Cunard, "Sylvania" also served on the Rotterdam—Southampton—Le Havre—Québec—Montreal -route and winter crossings between Liverpool and Halifax via Greenock.