Crossword clues for the word: WHENPIGSFLY The word WHENPIGSFLY has appeared as an answer to at least 2 crossword clues on different crossword puzzles. Crossword clues for WHENPIGSFLY Showing 1 to 2 of 2 results Clue(s) "That'll be the day!" Wilbur: "Can I train to be a pilot?" / Instructor: "___"