Cut the chicken breasts in half to make them thinner. This will help them cook evenly in the air fryer without drying out.

Sprinkle salt on all sides of the chicken and return the chicken to the refrigerator for about 30 minutes.

Pat the chicken dry. Rub olive oil along both sides of each piece of chicken. Mix together the black pepper, garlic powder, onion powder, and oregano, and sprinkle the mixture on both sides of the chicken pieces. Spritz a light layer of cooking spray on the chicken.

Preheat the air fryer to 400°F for 5-10 minutes.

Air fry the chicken for 5-10 minutes until a crisp, light brown crust forms. Reduce the temperature to 350°F and continue to cook the chicken until it reaches an internal temperature of at least 165°F (usually about 10-15 more minutes). Flip the chicken to the other side once about halfway through the cooking process.

Rest the chicken on a clean plate tented loosely with foil for 5 minutes before serving.