Plus ultra (motto) (Latin for "further beyond"), the motto of, among others, Holy Roman Emperor Charles V
Plus Ultra (aircraft), a seaplane flown by a team of Spanish aviators, including Ramón Franco and Julio Ruiz de Alda Miqueleiz, on a Trans-Atlantic flight in 1926
AD Plus Ultra, a former Spanish football team, now known as Real Madrid Castilla
Plus Ultra Brigade, a brigade of troops from five Spanish speaking countries including Spain, the Dominican Republic, Nicaragua, Honduras, and El Salvador, which served in the Iraq War