Preheat your air fryer to 400˚F.
If necessary, cut the chicken breasts so that they are around 1 inch in thickness.
Spray your air fryer basket with cooking spray. Spray both sides of your chicken with cooking spray and sprinkle with salt and pepper.
Place the chicken in a single layer on your air fryer and cook in your preheated air fryer for around 12 minutes, flipping halfway through.