What a coincidence!

Meaning

This phrase notes the strange timing of two events occurring simultaneously. It is often said with a skeptical tone when someone does not actually believe the events are unrelated.

Skeptical, observant

Used in a sentence

• You showed up exactly when I was complaining about you. What a coincidence!
• We both bought the same shirt. What a coincidence.
• Oh, you are going to the same park at the same time? What a coincidence.