The Wall Street Journal crossword can be very challenging. But we are here to help! Today we will help you find the answer to the clue '...to see if reindeer really know ___ to fly'. After hunting for any other hints and relevant information in the Wall Street Journal crossword puzzle we've found the answer to the clue '...to see if reindeer really know ___ to fly'. The answer to the clue '...to see if reindeer really know ___ to fly' is: