NOC have lost a few charters in the downturn with XL Holidays, Great Escapes, United Travel, Slattery Sun and a few others ceasing trading. Bourgas, Crete, Malaga, Majorca, Ibiza, Seville & Las Palmas operated in previous years. But they have gained Panorama and Sunworld of Thomas Cook Group and the 2 Ryanair sun routes.
Cadiz-Jerez is listed on the airport website under Claffey Tours, looks like an occasional charter:
Ireland West Airport Knock