In 1947 and 1959–60 Höngen performed at La Scala in Milano, the Covent Garden Opera House in London, the Teatro Colón in Buenos Aires, the Grand Opéra in Paris, in Amsterdam, Zürich, Berlin und Munich.
She sang at the Edinburgh Festival, and performed the Fricka und Waltraute in Richard Wagner's Nibelungenring at the Bayreuther Festspiele in 1951, as well as the Maggio Musicale Fiorentino in Florence.
In 1957, she accepted a position as a professor at the Wiener Musikakademie while at the same time continuing her stage career.
[1] She sang the title role in Britten's The Rape of Lucretia, and Baba the Turk in Stravinsky's The Rake's Progress.
[3] Her voice has been described as "rich, beautifully formed, with dramatic delivery and strength and feeling for style exciting admiration" ("Umfangreiche, schön gebildete Stimme, deren dramatische Ausdruckskraft und deren Stilgefühl Bewunderung erregten").