NaCl, as a single pairing of one Na atom and one Cl atom, is a molecule. But I think you're right, we consider crystalline ionic compounds to be ionic compounds, not molecules, when they're solids. Probably there are some isolated NaCl molecules on Earth, but you're right that when we encounter salt, it's mostly in crystals.

However, in gas phase, it floats around as NaCl. If you heated NaCl hot enough in a lab at atmospheric pressure (~1500 K according to another poster), you would have a bunch of NaCl gas floating around.