Spread oats and coconut flakes onto a rimmed baking sheet.
Bake in the preheated oven for 8 minutes; stir oats and coconut and rotate baking sheet. Continue baking until oats and coconut are toasted, about 8 more minutes.
Whisk honey, coconut oil, vanilla extract, and cinnamon together in a bowl until smooth. Add oat mixture to honey mixture and stir until evenly coated.
Line the baking sheet with a silicone liner or parchment paper. Spread oat mixture evenly onto baking sheet.
Bake in the oven until granola is toasted, 8 to 15 minutes. Stir granola and transfer liner and granola to a wire rack to cool completely.