Cut chicken breasts in half lengthwise if needed.

Season chicken breasts on both sides with your choice of seasoning.

Spray the basket of your air fryer with cooking spray.

Place chicken in one layer in the air fryer basket; you may need to cook in multiple batches.

Set the air fryer to 400 for 15 minutes.

Halfway through the cooking time, open the air fryer and flip the chicken breasts over.

Repeat in additional batches if needed.