RMS Carinthia started on her maiden voyage to Montreal on 27 June 1956 with 890 passengers and crew on board.

[6] The ship's crew went on strike and others came out in support leaving many liners tied up in the Liverpool docks for several weeks.

Carinthia was still operated from Liverpool to Montreal until the end of 1966, and from Southampton to Montreal and New York until after March 1967 Cunard Line decided to start operating the Carinthia as a cruise ship during the winter months.

During 1968, along with Sylvania, she was sold to Sitmar Line, initially renamed Fairland[4] and laid up at Southampton for two years.

Regent Isle was advertised for Regency's 1996 season, but due to their September 1995 bankruptcy, she never made a voyage for them.

n 1997 the ship commenced voyages for P&O Holidays, replacing the recently retired TSS Fairstar.

While under scrapping, a fire broke out in the engine room, killing five workers, and injuring another fifteen people.