He has sung Monteverdi, Purcell, Cesti, Cavalli, Lully, Charpentier, Rameau, Handel or Mozart, and also Verdi, Bellini, Massenet, Offenbach, Janáček.
He has participated in more than forty radio and CD recordings for Erato, EMI France, Adda, Opus 111, Naxos, Harmonia Mundi labels ...
In 2005, he wrote, directed, conducted and performed the show La Fontaine Incognito to music by Isabelle Aboulker for the Grand Théâtre de Limoges.
He was heard in Massenet's Hérodiade (Phanuel) and Bizet's Les pêcheurs de perles (Nourabad) at the Dorset Opera Festival, Massenet's Manon (comte des Grieux) on tour in the Netherlands, Cherubini's Médée (Creon) on tour in the Netherlands, Massenet's Don Quichotte (title role) and Gounod's Roméo et Juliette (Frère Laurent) in Limoges, Stravinsky's Pulcinella with the Orchestre national de Lille, a revival of The Tales of Hoffmann in Geneva, La Veuve et le Grillon, a work by Daniel Soulier,[4] The Love for Three Oranges in Dijon and Limoges, Mozart's The Marriage of Figaro in Tourcoing and the Théâtre des Champs-Elysées, Busoni's Turandot Dijon, revival of Lully's Atys in Paris, Caen, Bordeaux, Versailles and New-York, Janáček's Jenůfa in Rennes and Limoges.
Among other projects, Deletré continues his collaboration with the American company Opera Lafayette: in the staging (and interpretation of the character of Baskir) for Félicien David's opera Lalla-Roukh in Washington and New York in January 2013, in the role of Don Alfonso in Cosi fan Tutte in October 2013 (reprise at the Château de Versailles on 30 January, 2 and 3 February 2014).