In 1977 she joined the English National Opera, where she created the role of Dolly in Iain Hamilton's Anna Karenina in 1981, and the Royal Opera House in 1983, and began appearing abroad, notably in France, Italy, and the United States.
Her repertoire ranges from baroque to contemporary works, with a specialty in the bel canto operas, notably of Rossini. In the mid 1970s she began a long association with Opera Rara, appearing in many long-forgotten bel canto works, both on stage and on recording. She can be heard in complete recordings of Donizetti's Ugo, conte di Parigi, L'assedio di Calais, Maria Padilla, Meyerbeer's Il crociato in Egitto and Rossini's Ricciardo e Zoraide and made a solo album with the title Della Jones sings Donizetti, in all of which one can appreciate her impeccable coloratura technique and strong feeling for words and music.
For Chandos records she also made albums such as Great Operatic Arias - Della Jones.
Della Jones is still at home in the international opera and concert world today. She currently lives in south-east England.