Thaw chicken breasts in refrigerator overnight or use quick thaw method (thaw in bowl of water in packaging or sealed plastic bag for 30 minutes or until product is thawed).
Preheat air fryer to 375°F.
Remove chicken breasts from packaging and pat dry. Lightly oil and season liberally.
Place chicken breasts on air fryer rack or in basket leaving 1 inch between portions.
Cook 7 oz. chicken breast 18-20 minutes and 4 oz. chicken breast 14-16 minutes, flipping halfway through cooking time.
Remove from air fryer, let rest 2-3 minutes and serve.