Preheat oven to 350º Spray jelly-roll pan with non-stick cooking spray.

Place air-popped popcorn in a large bowl.

Stir honey, butter and cinnamon in a small saucepan over low heat until butter is melted and mixture is smooth; immediately pour over popcorn. Toss with a spoon to evenly coat, pour onto prepared pan; bake 12 to 14 minutes or until coating is golden brown and appears crackled, stirring twice during baking. Sprinkle with salt to taste. Let cool on pan for 5 minutes. (As popcorn cools, coating becomes crisp.) When cool, stir in cinnamon chips.