Bill: Look at the clock! Mary: How time flies! I guess you'll be going. Bill: Yes, I have to get up early.John: My watch says it's nearly midnight. How time flies! Jane: Yes, it's late. We really must go. (Google)
"Look at how big Billy is getting," said Uncle Michael. "My, how time flies."Tom: It seems it was just yesterday that I graduated from high school. Now I'm a grandfather. Mary: My, how time flies. (Google)
Our suave heroes were transformed into Laurel and Hardy: suburban life speeded up into some manic, coronary inducing rush hour. How time flies! (BNC)