What does it mean to dream about fly?
A fly often stands for a small persistent irritation, a buzzing distraction, or a reminder of something decaying or neglected.
Four ways to read it
Each reading below comes from a named tradition and a cited source, so you can see where it came from and decide what fits your dream.
Freud
Freud might read the fly as a minor but maddening intrusion, an unwelcome thought that keeps returning no matter how it is brushed away. Where it lands could hint at what is troubling you. He would ask your own associations.
After Freud, The Interpretation of Dreams (Brill trans., 1913), public domain.Jung
For Jung the fly can image a nagging psychic content, small yet impossible to ignore, sometimes drawn to what has gone stale within. It points attention to neglected corners.
Jungian concept (our summary).Modern
In continuity terms a fly may echo a recent annoyance or a distraction that broke your focus. The dream often mirrors irritation that is petty but persistent.
Continuity hypothesis (our summary).Mythological
In old lore flies gathered where corruption lay, and some traditions named a lord of flies among the powers of decay. They were long read as omens of spoilage.
Rosmerta Publishing editorial synthesis (after Brewer).