The phrase "are a fiasco" refers to a situation that is a complete failure or a disaster. Some antonyms for this phrase could be "are a success", "are a triumph", "are a victory", or "are a sensation". These words suggest that the opposite of a fiasco is something that is positive, satisfactory, and accomplished. Other antonyms that could apply to this phrase include "are a hit", "are a masterpiece", "are a masterpiece", or "are a breakthrough". These terms all indicate that the situation at hand is successful, impressive, and superior. Overall, using antonyms for "are a fiasco" can help to convey a more optimistic and positive perspective on a given situation.