There are several synonyms for the phrase "fly blind," which means to proceed without accurate information or guidance. Some of these synonyms include "navigate blindly," "wing it," "take a shot in the dark," "jump into the unknown," "take a chance," and "fly by the seat of your pants." All of these expressions convey the idea of moving forward with little or no preparation or foresight. When you "fly blind," you expose yourself to risk and uncertainty, but sometimes it's necessary to take a leap of faith in order to achieve your goals. Just remember to stay alert and be prepared for whatever comes your way.