When pigs fly, a figure of speech to express impossibilityWhen Pigs Fly (Vollmer album), 1990When Pigs Fly: Songs You Never Thought You'd Hear (Cevin Soling album), a compilation album of covers by various artists, 2002When Pigs Fly (The Chicharones album), 2005When Pigs Fly (musical), a 1996 musical revueWhen Pigs Fly (film), a 1993 film directed by Sara DriverWhen Pigs Fly Incorporated, a television production company owned by Gary Glasberg reference
