The phrase "most pie-in-the-sky" is used to describe something that is unrealistic or unlikely to happen. Antonyms for this phrase would include words like practical, realistic, achievable, possible, credible, and probable. These terms describe something that is grounded in reality and has a reasonable chance of success. Other antonyms could include words like pragmatic, sensible, down-to-earth, balanced, and level-headed. When considering options or decisions, it is important to weigh both the pie-in-the-sky and practical options to determine the best course of action.