Preheat your air fryer to 380°F.
Slice the bananas into 1/2 inch thick pieces.
In a bowl, mix brown sugar and cinnamon.
Spray or lightly oil the air fryer basket.
Place banana slices in the basket in a single layer.
Sprinkle the cinnamon sugar mixture over the slices.
Air fry for 6-8 minutes or until golden and slightly caramelized.
Serve warm as-is or with yogurt, ice cream, or oatmeal.