In a small bowl or jar, combine fine sea salt, nutritional yeast, garlic powder, onion powder, smoked paprika, cayenne pepper, and dried dill.
Stir or shake the mixture until thoroughly combined and evenly distributed.
Pop popcorn using your preferred method (stovetop, air popper, or microwave).
Drizzle the warm popcorn with melted butter or olive oil to help the seasoning adhere.
Sprinkle the homemade seasoning generously over the popcorn and toss gently to coat.
Taste and adjust seasoning as desired.
Store any leftover seasoning in an airtight container in your pantry; it will stay fresh for months.